{"id":3025,"date":"2024-01-22T18:17:47","date_gmt":"2024-01-22T18:17:47","guid":{"rendered":"https:\/\/urbanastrophotography.com\/staging\/7355\/?p=3025"},"modified":"2026-09-19T12:37:39","modified_gmt":"2026-09-19T12:37:39","slug":"review-optolong-l-quad-enhance","status":"publish","type":"post","link":"https:\/\/urbanastrophotography.com\/staging\/7355\/review-optolong-l-quad-enhance\/","title":{"rendered":"Review: Optolong L-Quad Enhance Filter"},"content":{"rendered":"\n<style>body.ua-editorial-page{background:#101315;color:#e8edef}body.ua-editorial-page #page{overflow:clip!important}body.ua-editorial-page #content>.wrapper,body.ua-editorial-page #primary,body.ua-editorial-page .singular-content-wrap{width:100%;max-width:none;padding-inline:0}.ua-editorial-post>.entry-header{display:none}.ua-editorial-post>.entry-content{max-width:1360px;margin:auto!important;padding:28px clamp(18px,3.2vw,44px) 56px;box-sizing:border-box;color:#e8edef}.ua-editorial-post .entry-content 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electricity.\",\"kind\":\"Article\",\"href\":\"\/staging\/7355\/how-to-use-mains-power-for-your-asiair-plus\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2022\/08\/MainsPower_1x1.jpg\"},\"1745\":{\"title\":\"Askar 130PHQ\",\"copy\":\"Explore my experience with the telescope.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-askar-130phq-flatfield-astrograph\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2021\/06\/MyAstroKit_1x1.jpg\"},\"1747\":{\"title\":\"Dualband Filter Shootout\",\"copy\":\"Compare L-eXtreme, L-Ultimate and Colour Magic 6nm filters.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/dualband-filter-shootout-l-extreme-vs-l-ultimate-vs-colour-magic-6nm\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2022\/10\/Dualband-shootout.jpg\"},\"1752\":{\"title\":\"Eagle Image Stacker\",\"copy\":\"Read my review of the image-stacking software.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-eagle-image-stacker\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2022\/10\/EagleImageStacker_1x1.jpg\"},\"1754\":{\"title\":\"William Optics 50mm Guidescope\",\"copy\":\"Read my review of the ROTO Lock guidescope.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-william-optics-50mm-guidescope-with-1-25-roto-lock\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2022\/11\/WOGuidescope_1x1.jpg\"},\"1834\":{\"title\":\"Talks and Presentations\",\"copy\":\"Explore my talks about astrophotography and the night sky.\",\"kind\":\"About\",\"href\":\"\/staging\/7355\/talks\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2022\/10\/Talks_1x1.jpg\"},\"1852\":{\"title\":\"Framing Custom Targets With ASIAIR\",\"copy\":\"Plan the framing of your next astrophotography 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filters.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-askar-colour-magic-e2-sii-oiii-filter-e2-vs-d2\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2025\/07\/v2_E2_starless-3.jpg\"},\"9780\":{\"title\":\"Immersed in Starlight\",\"copy\":\"Explore my astrophotography exhibition.\",\"kind\":\"Article\",\"href\":\"\/staging\/7355\/exhibition-immersed-in-starlight\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2025\/11\/Immersed_1x1_UAres.webp\"},\"11623\":{\"title\":\"ZWO ASI 220MM Mini\",\"copy\":\"Read my review of the guide camera.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-zwo-asi-220mm-mini\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2026\/02\/ZWO220MMUAres_1x1.webp\"},\"11624\":{\"title\":\"Askar M54 Off-Axis Guider\",\"copy\":\"Explore the off-axis guider in my setup.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-askar-m54-off-axis-guider\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2026\/02\/AskarOAG_UAres_1x1.webp\"},\"11654\":{\"title\":\"StellarDrive X 6R PRO\",\"copy\":\"See how the mount performs in my imaging setup.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-stellardrive-x-6r-pro-mount-darkframe-optics\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2026\/02\/001-Stellardrive-UAres_1x1-16-Jan-2026-NZ8_5637-LEE-PULLEN-PHOTOGRAPHY.webp\"},\"13036\":{\"title\":\"Svbony SV535\",\"copy\":\"Explore my review of the 105mm f\/2.8 astrograph.\",\"kind\":\"Review\",\"href\":\"\/staging\/7355\/review-svbony-sv535-105mm-f-2-8-astrograph\/\",\"src\":\"\/staging\/7355\/wp-content\/uploads\/2026\/03\/Svbony535_UAres_1x1.webp\"}},map={\"216\":[1258,3151,325],\"314\":[11654,11624,1258],\"317\":[1018,2544,2274],\"320\":[314,1018,1834],\"325\":[1096,1661,2274],\"327\":[3025,3151,1747],\"425\":[314,11654,2346],\"899\":[9780,320,1834],\"957\":[2544,3180,2346],\"1018\":[314,216,3151],\"1096\":[1661,1852,325],\"1182\":[2544,425,314],\"1236\":[314,1661,325],\"1258\":[216,3151,3005],\"1299\":[1745,13036,1381],\"1350\":[216,3180,425],\"1381\":[1400,1754,11624],\"1400\":[11623,1381,1754],\"1444\":[2544,2346,3180],\"1661\":[1096,314,325],\"1745\":[1299,13036,11624],\"1747\":[1958,5424,3151],\"1752\":[2544,1444,2132],\"1754\":[1381,11623,11624],\"1834\":[9780,2953,320],\"1852\":[1096,2274,2953],\"1958\":[5424,1747,3151],\"2132\":[2346,1444,2544],\"2274\":[1852,325,1018],\"2346\":[1444,3180,2132],\"2544\":[1444,1182,3180],\"2610\":[1958,5424,2544],\"2915\":[2953,1018,1852],\"2953\":[2915,1834,1018],\"3005\":[1258,11623,314],\"3025\":[327,3151,1747],\"3151\":[1747,3025,1958],\"3180\":[2544,2346,1258],\"5424\":[1958,1747,3151],\"9780\":[1834,899,320],\"11623\":[11624,1400,11654],\"11624\":[11623,1754,11654],\"11654\":[11624,11623,314],\"13036\":[1299,1745,1258]},id=post.id.replace('post-',''),items=map[id];if(!items)return;const section=document.createElement('section');section.id='related-content';section.className='ua-related-content';section.setAttribute('aria-labelledby','ua-related-heading');const heading=document.createElement('h2');heading.id='ua-related-heading';heading.textContent='Related content';const grid=document.createElement('div');grid.className='ua-related-grid';section.append(heading,grid);items.forEach(key=>{const item=cards[key],a=document.createElement('a'),img=document.createElement('img'),body=document.createElement('div'),kind=document.createElement('span'),title=document.createElement('h3'),copy=document.createElement('p'),more=document.createElement('span');a.className='ua-related-link';a.href=item.href;img.src=item.src;img.alt='';img.loading='lazy';img.decoding='async';img.width=800;img.height=600;body.className='ua-related-copy';kind.className='ua-related-kind';kind.textContent=item.kind;title.textContent=item.title;copy.textContent=id==='11623'&&key===1400?'Read my review of the other guide camera in the comparison.':item.copy;more.className='ua-related-more';more.textContent=item.kind==='Review'?'Read review \u2192':item.kind==='Article'?'Read article \u2192':'Explore \u2192';body.append(kind,title,copy,more);a.append(img,body);grid.append(a)});const footer=root.querySelector('.ua-editorial-footer');if(footer)footer.before(section);else root.append(section);post.closest('main')?.querySelector('nav.post-navigation')?.remove();}if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',addRelated);else addRelated();})();<\/script>\n\n\n<script type=\"application\/json\" class=\"ua-editorial-config\">{\"id\":3025,\"kind\":\"Reviews\",\"route\":\"reviews\",\"main\":[[0,\"Overview\"],[1,\"Filter background\"],[2,\"L-Quad Enhance\"],[3,\"Rotten Fish\"],[4,\"M81 & M82\"],[5,\"Verdict\"],[6,\"Where to buy\"]],\"insert\":[],\"rollout\":true}<\/script>\n\n\n<div class=\"wp-block-cover alignfull wp-duotone-unset-1\" style=\"min-height:500px;aspect-ratio:unset;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"581\" class=\"wp-block-cover__image-background wp-image-3046 size-full\" alt=\"Image of galaxies M81 and M82, photographed using an Optolong L-Quad Enhance filter\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=880%2C581&#038;ssl=1\" data-object-fit=\"cover\" srcset=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?w=2560&amp;ssl=1 2560w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=300%2C198&amp;ssl=1 300w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=1024%2C676&amp;ssl=1 1024w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=768%2C507&amp;ssl=1 768w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=1536%2C1013&amp;ssl=1 1536w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=2048%2C1351&amp;ssl=1 2048w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=500%2C330&amp;ssl=1 500w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=800%2C528&amp;ssl=1 800w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=1280%2C845&amp;ssl=1 1280w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?resize=1920%2C1267&amp;ssl=1 1920w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?w=1760&amp;ssl=1 1760w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-eighty-black-background-color has-background-dim-40 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99, .wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99[data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"]{text-align:center;font-size:var(--global-kb-font-size-xxl, 4rem);font-style:normal;text-shadow:0px 3px 6px #000000;}.wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99[data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99[data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99, .wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99[data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"]{text-shadow:0px 3px 6px #000000;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99, .wp-block-kadence-advancedheading.kt-adv-heading3025_4e0ed8-99[data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"]{text-shadow:0px 3px 6px #000000;}}<\/style>\n<h1 class=\"kt-adv-heading3025_4e0ed8-99 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_4e0ed8-99\"><strong>REVIEW:<\/strong><br>Optolong L-Quad Enhance Filter<\/h1>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4, .wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4[data-kb-block=\"kb-adv-heading3025_4a0dae-f4\"]{text-align:center;font-weight:400;font-style:normal;font-family:Oxygen;text-shadow:1px 1px 6px #000000;}.wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4[data-kb-block=\"kb-adv-heading3025_4a0dae-f4\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4[data-kb-block=\"kb-adv-heading3025_4a0dae-f4\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4, .wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4[data-kb-block=\"kb-adv-heading3025_4a0dae-f4\"]{text-shadow:1px 1px 6px #000000;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4, .wp-block-kadence-advancedheading.kt-adv-heading3025_4a0dae-f4[data-kb-block=\"kb-adv-heading3025_4a0dae-f4\"]{text-shadow:1px 1px 6px #000000;}}<\/style>\n<p class=\"kt-adv-heading3025_4a0dae-f4 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_4a0dae-f4\">First published 22 January 2024<br>Last updated February 2026 <\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-3025_c7eb8e-31 .kt-block-spacer{height:6px;}.wp-block-kadence-spacer.kt-block-spacer-3025_c7eb8e-31 .kt-divider{border-top-width:2px;border-top-color:rgba(255, 255, 255, 0.60);width:30%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-3025_c7eb8e-31\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_510cf0-57{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_510cf0-57 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_510cf0-57 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_510cf0-57 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, calc(30% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)))minmax(0, calc(70% - ((var(--global-kb-gap-md, 2rem) * 1 )\/2)));}.kb-row-layout-id3025_510cf0-57{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_510cf0-57 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_510cf0-57 > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_510cf0-57 > .kt-row-column-wrap{grid-template-columns:repeat(2, minmax(0, 1fr));}}@media all and (max-width: 1024px){.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_510cf0-57 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_510cf0-57 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_510cf0-57 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\" id=\"intro\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_c61e4a-6d > .kt-inside-inner-col,.kadence-column3025_c61e4a-6d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_c61e4a-6d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_c61e4a-6d > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_c61e4a-6d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_c61e4a-6d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_c61e4a-6d{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_c61e4a-6d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_c61e4a-6d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_c61e4a-6d\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedbtn.kb-btns3025_96364a-1f{padding-top:6px;gap:3px;flex-direction:row;justify-content:flex-start;align-items:center;}.kt-btns3025_96364a-1f .kt-button{font-weight:normal;font-style:normal;}.kt-btns3025_96364a-1f .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns3025_96364a-1f .kt-btn-wrap-0 .kt-button:focus{background:#444444;}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn.kb-btns3025_96364a-1f{justify-content:center;}}<\/style>\n<div class=\"toc-rail wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns3025_96364a-1f\"><style>.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button{color:#ffffff;background:#363636;font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:focus{color:#ffffff;background:#363636;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_7493f9-07.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_7493f9-07 kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#intro\"><span class=\"kt-btn-inner-text\"><strong>Contents<\/strong><\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_297fc5-5d.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_297fc5-5d kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#filters_filters_everywhere\"><span class=\"kt-btn-inner-text\">Filters, filters, everywhere&#8230;<\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_4b12bc-20.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_4b12bc-20 kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#lquad\"><span class=\"kt-btn-inner-text\"><strong>Optolong L-Quad Enhance<\/strong><\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_b41130-72.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_b41130-72 kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#target1\"><span class=\"kt-btn-inner-text\">Target 1: <br>The Rotten Fish Nebula<\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_666ada-2f.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_666ada-2f kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#target2\"><span class=\"kt-btn-inner-text\">Target 2: <br>M81\/M82<\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_3babd7-3b.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_3babd7-3b kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#verdict\"><span class=\"kt-btn-inner-text\">What&#8217;s the verdict?<\/span><\/a>\n\n<style>.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button, ul.menu .wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button{width:210px;}.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button{color:#e0e0e0;background:rgba(0,0,0,0);font-size:15px;line-height:1.3;letter-spacing:-0.01px;font-family:Oxygen;font-weight:400;text-transform:none;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:focus{color:#ffffff;background:rgba(255,255,255,0.08);border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button{border-top:1px solid rgba(255,255,255,0.22);border-right:1px solid rgba(255,255,255,0.22);border-bottom:1px solid rgba(255,255,255,0.22);border-left:1px solid rgba(255,255,255,0.22);}.wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn3025_107dc8-63.kb-button:focus{border-top:1px solid rgba(255,255,255,0.35);border-right:1px solid rgba(255,255,255,0.35);border-bottom:1px solid rgba(255,255,255,0.35);border-left:1px solid rgba(255,255,255,0.35);}}<\/style><a class=\"kb-button kt-button button kb-btn3025_107dc8-63 kt-btn-size-small kt-btn-width-type-fixed kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"#where-to-buy\"><span class=\"kt-btn-inner-text\">Where to buy<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column3025_42508f-78 > .kt-inside-inner-col,.kadence-column3025_42508f-78 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_42508f-78 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_42508f-78 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_42508f-78 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_42508f-78 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_42508f-78{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_42508f-78 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_42508f-78 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_42508f-78\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa, .wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa[data-kb-block=\"kb-adv-heading3025_f027d2-fa\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa[data-kb-block=\"kb-adv-heading3025_f027d2-fa\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_f027d2-fa[data-kb-block=\"kb-adv-heading3025_f027d2-fa\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 class=\"kt-adv-heading3025_f027d2-fa wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_f027d2-fa\">Intro<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #fffffe;\" class=\"stk-highlight\"><span style=\"color: #fffffe;\" class=\"stk-highlight\"><span style=\"color: #fffffe;\" class=\"stk-highlight\">Optolong have released a new broadband light pollution filter, the L-Quad Enhance, designed to improve astrophotography results under bright urban skies. In this review, I test the filter in real-world city conditions to see how well it suppresses light pollution, what impact it has on colour balance and signal, and whether it\u2019s a worthwhile option for imaging from heavily light polluted locations.<\/span><\/span><\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"587\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=880%2C587&#038;ssl=1\" alt=\"Optolong L-Quad Enhance broadband light pollution filter, for use with a One Shot Colour (OSC) camera\" class=\"wp-image-10948\" srcset=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1024%2C683&amp;ssl=1 1024w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1536%2C1024&amp;ssl=1 1536w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=2048%2C1366&amp;ssl=1 2048w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=500%2C333&amp;ssl=1 500w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=800%2C533&amp;ssl=1 800w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1280%2C854&amp;ssl=1 1280w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1920%2C1280&amp;ssl=1 1920w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=507%2C338&amp;ssl=1 507w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?w=1760&amp;ssl=1 1760w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_a49098-92{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_a49098-92 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_a49098-92 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_a49098-92 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_a49098-92{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_a49098-92 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_a49098-92 > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_a49098-92 ,.kb-row-layout-id3025_a49098-92 h1,.kb-row-layout-id3025_a49098-92 h2,.kb-row-layout-id3025_a49098-92 h3,.kb-row-layout-id3025_a49098-92 h4,.kb-row-layout-id3025_a49098-92 h5,.kb-row-layout-id3025_a49098-92 h6{color:#ffffff;}.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_a49098-92 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_a49098-92 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_a49098-92 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_a49098-92 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_a23b47-94 > .kt-inside-inner-col,.kadence-column3025_a23b47-94 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_a23b47-94 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_a23b47-94 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_a23b47-94 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_a23b47-94 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_a23b47-94{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_a23b47-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_a23b47-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_a23b47-94\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db, .wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db[data-kb-block=\"kb-adv-heading3025_a70335-db\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db[data-kb-block=\"kb-adv-heading3025_a70335-db\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_a70335-db[data-kb-block=\"kb-adv-heading3025_a70335-db\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 id=\"filters_filters_everywhere\" class=\"kt-adv-heading3025_a70335-db wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_a70335-db\">Filters, filters, everywhere&#8230;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">We astrophotographers sure love our filters. <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/osc-vs-mono-from-a-city\/\" target=\"_blank\" rel=\"noreferrer noopener\">OSC imagers<\/a>, like me, benefit hugely from a particular type called <em>dualband filters<\/em>. These allow us to take striking photos of narrowband targets &#8212; that is, objects in space that give out most of their light in specific wavelengths, most commonly Hydrogen-alpha. They also neatly bypass a lot of light pollution that plagues our city skies. I recommend an <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/dualband-filter-shootout-l-extreme-vs-l-ultimate-vs-colour-magic-6nm\/\" target=\"_blank\" rel=\"noreferrer noopener\">Optolong L-Ultimate<\/a> filter for narrowband targets, and I also enjoy mixing in <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/coming-soon-review-askar-colour-magic-d1-and-d2-duo-band-filters-ha-oiii-sii-oiii\/\" target=\"_blank\" rel=\"noreferrer noopener\">Askar D2<\/a> data. But what about broadband targets? Stars, galaxies, reflection nebulae&#8230; these give out lots of light across the spectrum, so aren&#8217;t suitable for use with the type of filters mentioned above. Broadband light pollution filters to the rescue! In theory at least&#8230;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are lots of broadband light pollution filters available. They&#8217;re designed to block light from artificial sources like street lights, while allowing the photons that we want &#8212; i.e. from that galaxy you&#8217;re trying to image &#8212; through to your camera sensor. Lots of city astrophotographers use a broadband light pollution filter as standard, but I don&#8217;t necessarily recommend this. Back in June 2021 I ran a <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/light-pollution-filter-shootout\/\" target=\"_blank\" rel=\"noreferrer noopener\">light pollution filter shootout<\/a>, where I tested three of the most popular broadband filters available at the time. Read the whole article for details, but the executive summary is that none of those filters actually helped more than they hindered. Since running that test, I&#8217;ve simply relied on <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/how-to-get-long-integration-times\/\" target=\"_blank\" rel=\"noreferrer noopener\">long integration times<\/a> to brute-force my way through light pollution when imaging broadband targets. And you know what? It&#8217;s worked just fine. Check out my photos of <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-pleiades\/\" target=\"_blank\" rel=\"noreferrer noopener\">The Pleiades <\/a>and <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-andromeda-galaxy\/\" target=\"_blank\" rel=\"noreferrer noopener\">The Andromeda Galaxy<\/a> for examples. They were both taken from a Bortle 8 city centre, using an OSC camera, with no filter. So, it&#8217;s fair to say I have a healthy scepticism of light pollution filters.<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_753535-9b{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_753535-9b > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_753535-9b > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_753535-9b > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_753535-9b{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_753535-9b > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_753535-9b > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_753535-9b ,.kb-row-layout-id3025_753535-9b h1,.kb-row-layout-id3025_753535-9b h2,.kb-row-layout-id3025_753535-9b h3,.kb-row-layout-id3025_753535-9b h4,.kb-row-layout-id3025_753535-9b h5,.kb-row-layout-id3025_753535-9b h6{color:#ffffff;}.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_753535-9b > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_753535-9b > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_753535-9b .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_753535-9b alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_8271b1-89 > .kt-inside-inner-col,.kadence-column3025_8271b1-89 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_8271b1-89 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_8271b1-89 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_8271b1-89 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_8271b1-89 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_8271b1-89{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_8271b1-89 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_8271b1-89 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_8271b1-89\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5, .wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5[data-kb-block=\"kb-adv-heading3025_8e02d0-d5\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5[data-kb-block=\"kb-adv-heading3025_8e02d0-d5\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_8e02d0-d5[data-kb-block=\"kb-adv-heading3025_8e02d0-d5\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 id=\"lquad\" class=\"kt-adv-heading3025_8e02d0-d5 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_8e02d0-d5\"><strong>Optolong L-Quad Enhance<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In late 2023, Optolong announced a brand new broadband light pollution filter: the L-Quad Enhance. Disclaimer: Optolong very kindly sent me this filter for this review. They&#8217;re also allowing me to keep it, free of charge. This generosity hasn&#8217;t impacted my review, however!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s a graph of the filter&#8217;s bandpasses, if you&#8217;re into that kind of thing:<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aafc6a9e1bfb&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aafc6a9e1bfb\" class=\"wp-block-image size-large is-resized wp-lightbox-container\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"431\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=880%2C431&#038;ssl=1\" alt=\"Graph showing bandpasses\" class=\"wp-image-3044\" style=\"width:881px;height:auto\" srcset=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=1024%2C501&amp;ssl=1 1024w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=300%2C147&amp;ssl=1 300w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=768%2C376&amp;ssl=1 768w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=500%2C244&amp;ssl=1 500w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?resize=800%2C391&amp;ssl=1 800w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF-bandpasses.jpg?w=1180&amp;ssl=1 1180w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Credit: Optolong.<\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The marketing blurb is full of claims about enhancing contrast and maximising colour balance. I&#8217;m more interested in real-world tests though, and I want to answer one question specifically: does this filter offer an improvement for me when shooting broadband targets, or am I better off with my current approach of not using any filter at all? Optolong do actually say that the L-Quad Enhance isn&#8217;t recommended for Bortle 8 or 9 skies (the worst levels of light pollution). It was brave of Optolong to encourage this review considering my skies are Bortle 8&#8230;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To test the Optolong L-Quad Enhance I used my beloved <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/review-askar-130phq-flatfield-astrograph\/\" target=\"_blank\" rel=\"noreferrer noopener\">Askar 130PHQ telescope<\/a>, and <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/review-zwo-asi2600mc-pro\/\" target=\"_blank\" rel=\"noreferrer noopener\">ZWO ASI2600 MC pro camera<\/a>. The camera actually broke mid-way through the review, which delayed things by a few months. See <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/zwo-rma-sending-a-broken-camera-from-the-uk-to-china-for-repairs\/\" target=\"_blank\" rel=\"noreferrer noopener\">ZWO RMA: Sending a Broken Camera from the UK to China for Repairs<\/a> to read more about that saga!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I&#8217;ve tried to be as fair as possible, although without two identical imaging rigs side-by-side, this is rather tricky! I chose two targets, then obtained an equal amount of good quality data using the L-Quad Enhance, and no filter. I then integrated these and then used <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/review-pixinsight\/\" target=\"_blank\" rel=\"noreferrer noopener\">PixInsight<\/a> to perform the same simple processing steps on both, in order to compare.<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_70a8c3-21{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_70a8c3-21 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_70a8c3-21 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_70a8c3-21 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_70a8c3-21{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_70a8c3-21 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_70a8c3-21 > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_70a8c3-21 ,.kb-row-layout-id3025_70a8c3-21 h1,.kb-row-layout-id3025_70a8c3-21 h2,.kb-row-layout-id3025_70a8c3-21 h3,.kb-row-layout-id3025_70a8c3-21 h4,.kb-row-layout-id3025_70a8c3-21 h5,.kb-row-layout-id3025_70a8c3-21 h6{color:#ffffff;}.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_70a8c3-21 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_70a8c3-21 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_70a8c3-21 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_70a8c3-21 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col,.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_ae8fe1-d4{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_ae8fe1-d4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_ae8fe1-d4\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1, .wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1[data-kb-block=\"kb-adv-heading3025_2e1ca1-b1\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1[data-kb-block=\"kb-adv-heading3025_2e1ca1-b1\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_2e1ca1-b1[data-kb-block=\"kb-adv-heading3025_2e1ca1-b1\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 id=\"target1\" class=\"kt-adv-heading3025_2e1ca1-b1 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_2e1ca1-b1\">Target 1: The Rotten Fish Nebula<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">My first target was The Rotten Fish Nebula, which is very challenging from light polluted skies. I integrated 10 hours of no filter data, and 10 hours of L-Quad Enhance (L-QEF). Use the sliders in the images below to compare.<\/p>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img loading=\"lazy\" decoding=\"async\" id=\"3026\" src=\"https:\/\/i1.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/NoFilter_10hrs_comparison-scaled.jpg?ssl=1\" alt=\"Unfiltered 10-hour integration of the Rotten Fish Nebula\" width=\"2560\" height=\"1713\" class=\"image-compare__image-before\"\/><img loading=\"lazy\" decoding=\"async\" id=\"3027\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/LQuad_10hrs_comparison-scaled.jpg?ssl=1\" alt=\"10-hour integration of the Rotten Fish Nebula using the Optolong L-Quad Enhance filter\" width=\"2560\" height=\"1713\" class=\"image-compare__image-after\"\/><\/div><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-577b5d2\" data-block-id=\"577b5d2\"><p class=\"stk-block-text__text\">The L-Quad Enhance data looks better to my eye. The colours are more pleasingly neutral, and there&#8217;s a bit more contrast. It&#8217;s not hugely striking, but noticeable (especially when viewing the originals). Let&#8217;s take a closer look&#8230;<\/p><\/div>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" id=\"3028\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/NoFilter_10hrs_closeup1.jpg?resize=600%2C600&#038;ssl=1\" alt=\"Close crop 1 of the unfiltered Rotten Fish Nebula integration\" width=\"600\" height=\"600\" class=\"image-compare__image-before\"\/><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" id=\"3029\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQuad_10hrs_closeup1.jpg?resize=600%2C600&#038;ssl=1\" alt=\"Close crop 1 of the Rotten Fish Nebula integration using the Optolong L-Quad Enhance filter\" width=\"600\" height=\"600\" class=\"image-compare__image-after\"\/><\/div><figcaption><br><\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-860db4c\" data-block-id=\"860db4c\"><p class=\"stk-block-text__text\">This close-in crop nicely shows the better colours of the L-Quad Enhance. It&#8217;s also helped bring out some detail in the faint background galaxy.<\/p><\/div>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" id=\"3030\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/NoFilter_10hrs_closeup2.jpg?resize=600%2C600&#038;ssl=1\" alt=\"Close crop 2 of the unfiltered Rotten Fish Nebula integration\" width=\"600\" height=\"600\" class=\"image-compare__image-before\"\/><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" id=\"3031\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQuad_10hrs_closeup2.jpg?resize=600%2C600&#038;ssl=1\" alt=\"Close crop 2 of the Rotten Fish Nebula integration using the Optolong L-Quad Enhance filter\" width=\"600\" height=\"600\" class=\"image-compare__image-after\"\/><\/div><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-279bda6\" data-block-id=\"279bda6\"><p class=\"stk-block-text__text\">More good news for the L-Quad Enhance in this crop too. The brightest star looks better defined, and two small glowing red clouds near the top (pockets of hydrogen gas perhaps) are hard to see with no filter, but are quite prominent with the L-Quad Enhance.<\/p><\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">I ran the two integrated stacks through PixInsight&#8217;s SubframeSelector tool in order to get some statistics to compare. The L-Quad Enhance wins in each of the three key categories I chose. The image has more stars, tighter stars, and better signal-to-noise ratio.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><em>10 hours of integrated data<\/em><\/td><td><strong>No filter<\/strong><\/td><td><strong>L-Quad Enhance<\/strong><\/td><\/tr><tr><td><strong>Stars<\/strong><br><em>(higher is better)<\/em><\/td><td>5322<\/td><td>7263<\/td><\/tr><tr><td><strong>FWHM<\/strong><br><em>(lower is better)<\/em><\/td><td>2.41<\/td><td>2.30<\/td><\/tr><tr><td><strong>SNR<\/strong><br><em>(higher is better)<\/em><\/td><td>2.54<\/td><td>4.39<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-ab2cf68\" data-block-id=\"ab2cf68\"><p class=\"stk-block-text__text\">You can read more about my Rotten Fish Nebula photo on its dedicated page <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-rotten-fish-nebula\/\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a>.<\/p><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_89e4d7-e2{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_89e4d7-e2 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_89e4d7-e2 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_89e4d7-e2 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_89e4d7-e2{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_89e4d7-e2 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_89e4d7-e2 > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_89e4d7-e2 ,.kb-row-layout-id3025_89e4d7-e2 h1,.kb-row-layout-id3025_89e4d7-e2 h2,.kb-row-layout-id3025_89e4d7-e2 h3,.kb-row-layout-id3025_89e4d7-e2 h4,.kb-row-layout-id3025_89e4d7-e2 h5,.kb-row-layout-id3025_89e4d7-e2 h6{color:#ffffff;}.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_89e4d7-e2 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_89e4d7-e2 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_89e4d7-e2 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_89e4d7-e2 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_130722-60 > .kt-inside-inner-col,.kadence-column3025_130722-60 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_130722-60 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_130722-60 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_130722-60 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_130722-60 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_130722-60{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_130722-60 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_130722-60 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_130722-60\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2, .wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2[data-kb-block=\"kb-adv-heading3025_a41285-a2\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2[data-kb-block=\"kb-adv-heading3025_a41285-a2\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_a41285-a2[data-kb-block=\"kb-adv-heading3025_a41285-a2\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 id=\"target2\" class=\"kt-adv-heading3025_a41285-a2 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_a41285-a2\">Target 2: M81\/M82<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">So far it&#8217;s looking good for the L-Quad Enhance. Will it become an essential part of my toolkit? Let&#8217;s proceed with target 2, the galaxies M81 and M82. 4.5 hours of data went into each of the integrated stacks.<\/p>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img loading=\"lazy\" decoding=\"async\" id=\"3035\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_NoFilter-UA-res.jpg?ssl=1\" alt=\"Unfiltered 4.5-hour integration of M81 and M82\" width=\"2560\" height=\"1707\" class=\"image-compare__image-before\"\/><img loading=\"lazy\" decoding=\"async\" id=\"3036\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res.jpg?ssl=1\" alt=\"4.5-hour integration of M81 and M82 using the Optolong L-Quad Enhance filter\" width=\"2560\" height=\"1707\" class=\"image-compare__image-after\"\/><\/div><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-2683af8\" data-block-id=\"2683af8\"><p class=\"stk-block-text__text\">The L-Quad Enhance version looks visibly better when viewed full resolution on my monitor. Hopefully it shows in the slider view above. It seemed to reduce gradients in the unedited stacks too, and the colours just look nicer, which has surprised me given other filters I&#8217;ve tested previously created nasty colour casts that were difficult to process out. Maybe Optolong&#8217;s claims are accurate. Let&#8217;s zoom in&#8230;<\/p><\/div>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img loading=\"lazy\" decoding=\"async\" id=\"3038\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_NoFilter_2-UA-res.jpg?ssl=1\" alt=\"Close crop 1 of the unfiltered M81 and M82 integration\" width=\"2560\" height=\"2560\" class=\"image-compare__image-before\"\/><img loading=\"lazy\" decoding=\"async\" id=\"3037\" src=\"https:\/\/i1.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF_2-UA-res.jpg?ssl=1\" alt=\"Close crop 1 of the M81 and M82 integration using the Optolong L-Quad Enhance filter\" width=\"2560\" height=\"2560\" class=\"image-compare__image-after\"\/><\/div><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-fc43042\" data-block-id=\"fc43042\"><p class=\"stk-block-text__text\">This close-in crop nicely shows the better colours of the L-Quad Enhance. It&#8217;s also helped bring out some detail in the faint background galaxy.The colours look better in the L-Quad Enhance, and the filter also seems to have brought out the areas of red hydrogen gas in the galaxy&#8217;s spiral arms, particularly at the top. This is a pleasant surprise. Will we see the same in neighbouring M82?<\/p><\/div>\n\n\n\n<figure class=\"wp-block-jetpack-image-compare\"><div class=\"juxtapose\" data-mode=\"horizontal\"><img loading=\"lazy\" decoding=\"async\" id=\"3039\" src=\"https:\/\/i1.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_NoFilter_1-UA-res.jpg?ssl=1\" alt=\"Close crop 2 of the unfiltered M81 and M82 integration\" width=\"2560\" height=\"2560\" class=\"image-compare__image-before\"\/><img loading=\"lazy\" decoding=\"async\" id=\"3040\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF_1-UA-res.jpg?ssl=1\" alt=\"Close crop 2 of the M81 and M82 integration using the Optolong L-Quad Enhance filter\" width=\"2560\" height=\"2560\" class=\"image-compare__image-after\"\/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The red hydrogen areas are definitely more prominent when using the L-Quad Enhance. Some of that is down to the colour, but I&#8217;m looking at this closely and think there&#8217;s more structure visible when using the filter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Running SubframeSelector on the two freshly-integrated stacks shows the L-Quad Enhance in the lead across the board again.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><em>4.5 hours of integrated data<\/em><\/td><td><strong>No filter<\/strong><\/td><td><strong>L-QEF<\/strong><\/td><\/tr><tr><td><strong>Stars<\/strong><br><em>(higher is better)<\/em><\/td><td>1521<\/td><td>1691<\/td><\/tr><tr><td><strong>FWHM<\/strong><br><em>(lower is better)<\/em><\/td><td>2.51<\/td><td>2.26<\/td><\/tr><tr><td><strong>SNR<\/strong><br><em>(higher is better)<\/em><\/td><td>2.14<\/td><td>2.41<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-2ea86c2\" data-block-id=\"2ea86c2\"><p class=\"stk-block-text__text\">I actually collected 6 hours and 24 minutes of decent quality data in total using the L-Quad Enhance. I went ahead and processed this, and I think the result is perfectly fine, especially considering the short integration time. (I normally aim for 20+ hours). For more details, and to see my previous M81 M82 attempts, you can visit a dedicated page <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-bode-and-cigar-galaxies-m81-and-m82\/\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a>.<\/p><\/div>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aafc6a9e3ada&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aafc6a9e3ada\" class=\"wp-block-image size-full wp-lightbox-container\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"581\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" 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https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/M81_M82_LQEF-UA-res-1.jpg?w=1760&amp;ssl=1 1760w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_5c3283-f1{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_5c3283-f1 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_5c3283-f1 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_5c3283-f1 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_5c3283-f1{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_5c3283-f1 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_5c3283-f1 > .kt-row-layout-overlay{opacity:0.30;}.kb-row-layout-id3025_5c3283-f1 ,.kb-row-layout-id3025_5c3283-f1 h1,.kb-row-layout-id3025_5c3283-f1 h2,.kb-row-layout-id3025_5c3283-f1 h3,.kb-row-layout-id3025_5c3283-f1 h4,.kb-row-layout-id3025_5c3283-f1 h5,.kb-row-layout-id3025_5c3283-f1 h6{color:#ffffff;}.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id3025_5c3283-f1 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id3025_5c3283-f1 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id3025_5c3283-f1 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_5c3283-f1 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_8db109-99 > .kt-inside-inner-col,.kadence-column3025_8db109-99 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_8db109-99 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_8db109-99 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_8db109-99 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_8db109-99 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_8db109-99{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_8db109-99 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_8db109-99 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_8db109-99\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2, .wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2[data-kb-block=\"kb-adv-heading3025_d443d6-a2\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2[data-kb-block=\"kb-adv-heading3025_d443d6-a2\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading3025_d443d6-a2[data-kb-block=\"kb-adv-heading3025_d443d6-a2\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h3 id=\"verdict\" class=\"kt-adv-heading3025_d443d6-a2 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading3025_d443d6-a2\">What&#8217;s the verdict?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">I admit it: I&#8217;m surprised by the result. I thought that I&#8217;d see a marginal benefit at most, but when processing the test images, it was just easier with the L-Quad Enhance data. I&#8217;ll be using it as standard for my broadband imaging. Note though that long integration times are still needed to get a decent signal-to-noise ratio! You can read more about that in my article <a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/how-to-get-long-integration-times\/\" target=\"_blank\" rel=\"noreferrer noopener\">How To Get Long Integration Times<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But! Before you rush out and buy one, a word of caution. The effectiveness of broadband light pollution filters like this one is very dependent on how they cope with specific sources of skyglow. The lights around me are not the same as the lights around you. (Unless you live in Bristol city centre!) So I can&#8217;t say for sure that this filter will benefit you. What I <em>can<\/em> say is that it&#8217;s the best broadband light pollution filter I&#8217;ve tested, and the only one I&#8217;ve found worth using. If you think you&#8217;d benefit too, by all means buy one but give it a good test before you commit to using it long-term, just to make sure you&#8217;re really getting a benefit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">THE END.<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<section class=\"ua-equipment-examples\" id=\"equipment-images\" aria-labelledby=\"ua-equipment-examples-title\" data-equipment-gallery=\"v2\">\n\n<h2 id=\"ua-equipment-examples-title\">Images using Optolong L-Quad Enhance<\/h2>\n<p>Finished images using Optolong L-Quad Enhance. Some combine data from other filters too; each target page explains the equipment and processing.<\/p>\n<div class=\"ua-equipment-examples-track\" tabindex=\"0\" role=\"region\" aria-label=\"4 images using Optolong L-Quad Enhance\" style=\"--ua-example-columns:4\"><a class=\"ua-equipment-example\" href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-iris-nebula\/\" data-gallery-id=\"96\"><img data-recalc-dims=\"1\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/08\/v3_Iris_UAres_watermarked.jpg?resize=880%2C576&#038;ssl=1\" srcset=\"https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/08\/v3_Iris_UAres_watermarked-300x197.jpg 300w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/08\/v3_Iris_UAres_watermarked-1024x671.jpg 1024w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/08\/v3_Iris_UAres_watermarked-768x503.jpg 768w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/08\/v3_Iris_UAres_watermarked-1536x1006.jpg 1536w\" sizes=\"auto, (max-width:600px) 80vw, 195px\" alt=\"The Iris Nebula photographed with 130PHQ\" width=\"880\" height=\"576\" loading=\"lazy\" decoding=\"async\"><span class=\"ua-equipment-caption\"><span class=\"ua-equipment-type\">L-Quad Enhance<\/span><strong>The Iris Nebula<\/strong><span class=\"ua-equipment-favourite\">Lee\u2019s favourite<\/span><span class=\"ua-equipment-explore\">Explore target \u2192<\/span><\/span><\/a>\n<a class=\"ua-equipment-example\" href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-triangulum-galaxy\/\" data-gallery-id=\"3390\"><img data-recalc-dims=\"1\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/12\/v2_M33_UAres_watermarked.jpg?resize=880%2C585&#038;ssl=1\" srcset=\"https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/12\/v2_M33_UAres_watermarked-300x199.jpg 300w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/12\/v2_M33_UAres_watermarked-1024x681.jpg 1024w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/12\/v2_M33_UAres_watermarked-768x511.jpg 768w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/12\/v2_M33_UAres_watermarked-1536x1021.jpg 1536w\" sizes=\"auto, (max-width:600px) 80vw, 195px\" alt=\"The Triangulum Galaxy photographed with 130PHQ\" width=\"880\" height=\"585\" loading=\"lazy\" decoding=\"async\"><span class=\"ua-equipment-caption\"><span class=\"ua-equipment-type\">L-Quad Enhance<\/span><strong>The Triangulum Galaxy<\/strong><span class=\"ua-equipment-favourite\">Lee\u2019s favourite<\/span><span class=\"ua-equipment-explore\">Explore target \u2192<\/span><\/span><\/a>\n<a class=\"ua-equipment-example\" href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/wr-134\/\" data-gallery-id=\"8810\"><img data-recalc-dims=\"1\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/10\/v2_WR134_UAres_watermarked.jpg?resize=880%2C587&#038;ssl=1\" srcset=\"https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/10\/v2_WR134_UAres_watermarked-300x200.jpg 300w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/10\/v2_WR134_UAres_watermarked-1024x684.jpg 1024w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/10\/v2_WR134_UAres_watermarked-768x513.jpg 768w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/10\/v2_WR134_UAres_watermarked-1536x1025.jpg 1536w\" sizes=\"auto, (max-width:600px) 80vw, 195px\" alt=\"WR 134 photographed with 130PHQ\" width=\"880\" height=\"587\" loading=\"lazy\" decoding=\"async\"><span class=\"ua-equipment-caption\"><span class=\"ua-equipment-type\">L-Quad Enhance<\/span><strong>WR 134<\/strong><span class=\"ua-equipment-favourite\">Lee\u2019s favourite<\/span><span class=\"ua-equipment-explore\">Explore target \u2192<\/span><\/span><\/a>\n<a class=\"ua-equipment-example\" href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/the-bat-nebula\/\" data-gallery-id=\"8162\"><img data-recalc-dims=\"1\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/09\/v1_BatNebula_Bat_UAres_watermarked.jpg?resize=880%2C584&#038;ssl=1\" srcset=\"https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/09\/v1_BatNebula_Bat_UAres_watermarked-300x199.jpg 300w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/09\/v1_BatNebula_Bat_UAres_watermarked-1024x680.jpg 1024w, https:\/\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2025\/09\/v1_BatNebula_Bat_UAres_watermarked-768x510.jpg 768w\" sizes=\"auto, (max-width:600px) 80vw, 195px\" alt=\"The Bat Nebula photographed with 130PHQ\" width=\"880\" height=\"584\" loading=\"lazy\" decoding=\"async\"><span class=\"ua-equipment-caption\"><span class=\"ua-equipment-type\">L-Quad Enhance<\/span><strong>The Bat Nebula<\/strong><span class=\"ua-equipment-favourite\">Lee\u2019s favourite<\/span><span class=\"ua-equipment-explore\">Explore target \u2192<\/span><\/span><\/a><\/div>\n<p class=\"ua-equipment-swipe\">Swipe to explore the images \u2192<\/p>\n<p class=\"ua-equipment-all\"><a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/targets\/?ua_filter=L-Quad%20Enhance\">See more photos using Optolong L-Quad Enhance \u2192<\/a><\/p>\n<\/section>\n<style id=\"ua-equipment-examples-style-3025\">\n#post-3025 .ua-equipment-examples{box-sizing:border-box;width:100%;max-width:780px;margin:64px auto;padding:0;scroll-margin-top:130px}\n#post-3025 .ua-equipment-examples h2{font-size:clamp(25px,3vw,34px);line-height:1.25;text-transform:none;margin:0 0 18px}\n#post-3025 .ua-equipment-examples>p{margin:0 0 24px}\n#post-3025 .ua-equipment-examples-track{display:grid;grid-template-columns:repeat(var(--ua-example-columns),minmax(0,1fr));gap:16px;max-width:100%;padding:3px 3px 12px}\n#post-3025 .ua-equipment-example{display:block;min-width:0;overflow:hidden;border:1px solid #343b3e;border-radius:5px;background:#151b1d;text-decoration:none;color:#f4f4f4}\n#post-3025 .ua-equipment-example:hover{border-color:#f7aa70}\n#post-3025 .ua-equipment-example:focus-visible,#post-3025 .ua-equipment-examples-track:focus-visible{outline:2px solid #f7aa70;outline-offset:3px}\n#post-3025 .ua-equipment-example img{display:block;width:100%!important;max-width:100%!important;height:auto!important;aspect-ratio:3\/2;object-fit:cover;background:#0b0e10;margin:0!important}\n#post-3025 .ua-equipment-caption{display:flex;flex-direction:column;gap:8px;padding:14px 12px}\n#post-3025 .ua-equipment-type{font-size:10px;letter-spacing:.05em;text-transform:uppercase;color:#bdc5c8}\n#post-3025 .ua-equipment-caption strong{font-size:16px;line-height:1.35;font-weight:600}\n#post-3025 .ua-equipment-favourite{font-size:11px;color:#bdc5c8}\n#post-3025 .ua-equipment-explore{font-size:12px;color:#f7aa70}\n#post-3025 .ua-equipment-examples .ua-equipment-all{margin:16px 0 0;font-size:15px}\n#post-3025 .ua-equipment-swipe{display:none}\n@media(max-width:600px){\n#post-3025 .ua-equipment-examples{margin:40px auto}\n#post-3025 .ua-equipment-examples-track{grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:83%;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding:3px;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:#687075 #151b1d}\n#post-3025 .ua-equipment-example{scroll-snap-align:start}\n#post-3025 .ua-equipment-examples .ua-equipment-swipe{display:block;font-size:12px;color:#bdc5c8;margin:4px 0 16px}\n}\n<\/style>\n<script>(function(){var root=document.querySelector('#post-3025 .ua-equipment-examples');if(!root)return;var media=window.matchMedia('(max-width:767px)');function updateLinks(){root.querySelectorAll('[data-mobile-url]').forEach(function(a){a.href=media.matches?a.dataset.mobileUrl:a.dataset.desktopUrl;});}updateLinks();media.addEventListener('change',updateLinks);})();<\/script>\n\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id3025_d6a353-00{margin-top:var(--global-kb-spacing-md, 2rem);}.kb-row-layout-id3025_d6a353-00 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_d6a353-00 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_d6a353-00 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-none, 0rem );max-width:900px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id3025_d6a353-00{border-top-right-radius:50px;border-bottom-left-radius:0px;overflow:clip;isolation:isolate;}.kb-row-layout-id3025_d6a353-00 > .kt-row-layout-overlay{border-top-right-radius:50px;border-bottom-left-radius:0px;}.kb-row-layout-id3025_d6a353-00 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id3025_d6a353-00 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id3025_d6a353-00 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_d6a353-00 alignnone has-eighty-black-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col,.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_a7b18e-e5{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_a7b18e-e5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_a7b18e-e5\"><div class=\"kt-inside-inner-col\">\n<h3 class=\"wp-block-heading\" id=\"where-to-buy\">Where to buy<\/h3>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><span style=\"color: #fffffe;\" class=\"stk-highlight\"><em>Affiliate links help support the site at no extra cost to you.<\/em><\/span><\/p>\n\n\n<style>.kb-row-layout-id3025_8edef7-60 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3025_8edef7-60 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3025_8edef7-60 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-sm, 1rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id3025_8edef7-60 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id3025_8edef7-60 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 767px){.kb-row-layout-id3025_8edef7-60 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id3025_8edef7-60 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column3025_abf387-c8 > .kt-inside-inner-col,.kadence-column3025_abf387-c8 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_abf387-c8 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_abf387-c8 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_abf387-c8 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_abf387-c8 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_abf387-c8{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_abf387-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_abf387-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_abf387-c8\"><div class=\"kt-inside-inner-col\">\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"587\" src=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=880%2C587&#038;ssl=1\" alt=\"Optolong L-Quad Enhance broadband light pollution filter, for use with a One Shot Colour (OSC) camera\" class=\"wp-image-10948\" srcset=\"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1024%2C683&amp;ssl=1 1024w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1536%2C1024&amp;ssl=1 1536w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=2048%2C1366&amp;ssl=1 2048w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=500%2C333&amp;ssl=1 500w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=800%2C533&amp;ssl=1 800w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1280%2C854&amp;ssl=1 1280w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=1920%2C1280&amp;ssl=1 1920w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?resize=507%2C338&amp;ssl=1 507w, https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2021\/10\/L-QuadEnhance_UAres_watermarked.webp?w=1760&amp;ssl=1 1760w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n<\/div><\/div>\n\n\n<style>.kadence-column3025_83c800-96 > .kt-inside-inner-col,.kadence-column3025_83c800-96 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column3025_83c800-96 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column3025_83c800-96 > .kt-inside-inner-col{flex-direction:column;}.kadence-column3025_83c800-96 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column3025_83c800-96 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column3025_83c800-96{position:relative;}@media all and (max-width: 1024px){.kadence-column3025_83c800-96 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column3025_83c800-96 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3025_83c800-96\"><div class=\"kt-inside-inner-col\">\n<p class=\"wp-block-paragraph\"><span style=\"color: #fffffe;\" class=\"stk-highlight\"><strong>Filter: Optolong L-Quad Enhance<\/strong><\/span><br><span style=\"color: #fffffe;\" class=\"stk-highlight\"><a href=\"https:\/\/www.astroshop.eu\/broadband-filters\/optolong-filters-l-quad-enhance-2-\/p,80320?affiliate_id=UrbanAstrophotography\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">Buy from Astroshop.eu<\/a><\/span><br><span style=\"color: #fffffe;\" class=\"stk-highlight\"><a href=\"https:\/\/www.highpointscientific.com\/optolong-2-l-quad-enhance-filter?rfsn=8945533.e3e877\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">Buy from High Point Scientific<\/a><\/span><\/p>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n<\/div><\/div>\n\n<style id=\"ua-lquad-flatten-legacy-rows\">\n#post-3025 .entry-content .wp-block-kadence-rowlayout.has-eighty-black-background-color,\n#post-3025 .entry-content .kb-row-layout-wrap.has-eighty-black-background-color {\n  background: transparent !important;\n  background-image: none !important;\n  border: 0 !important;\n  box-shadow: none !important;\n}\n<\/style>\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<hr class=\"is-style-wide wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"nfd-container nfd-py-lg nfd-theme-dark nfd-bg-surface nfd-wb-text__text-20 engagement-columns ticss-c88d95c9 is-style-nfd-theme-dark wp-block-group has-eighty-black-background-color has-background\" style=\"border-top-width:1px;border-bottom-width:1px\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Book a Masterclass<\/strong><\/p>\n\n\n\n<p 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!important;\n  max-width: none !important;\n  margin-left: 0 !important;\n  margin-right: 0 !important;\n}\n<\/style><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"https:\/\/urbanastrophotography.com\/staging\/7355\/review-optolong-l-quad-enhance\/\" class=\"more-link\">View article<span class=\"screen-reader-text\">Review: Optolong L-Quad Enhance Filter<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":3049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_themeisle_gutenberg_block_has_review":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_vp_format_video_url":"","_vp_image_focal_point":[],"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[19,31,47],"tags":[],"object-type":[],"imaging-filter":[],"image-year":[],"telescope":[],"camera":[],"class_list":["post-3025","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-broadband","category-reviews","category-optolong-l-quad-enhance"],"featured_image_src":"https:\/\/i0.wp.com\/urbanastrophotography.com\/staging\/7355\/wp-content\/uploads\/2024\/01\/LQEF.jpeg?fit=823%2C823&ssl=1","author_info":{"display_name":"Lee","author_link":"https:\/\/urbanastrophotography.com\/staging\/7355\/author\/lee\/"},"yoast_head":"<!-- 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