{"title":"Light Pollution, CLS and Nebula Filters for Telescopes","description":"\u003cp\u003eBrowse our Light Pollution, CLS and Nebula Filters for Telescopes collection. Best Price.\u003c\/p\u003e","products":[{"product_id":"baader-uhc-l-ultra-l-booster-filter-cmos-optimized","title":"Baader UHC-L \/ Ultra-L-Booster Filter (CMOS-optimized)","description":"\u003ch1 class=\"product-title\"\u003eBaader UHC-L \/ Ultra-L-Booster Filter (CMOS-optimized)\u003c\/h1\u003e\n\u003cp\u003eNew CMOS-optimized Baader UHC-L DeepSky Filter from Baader Planetarium with Reflex-Blocker™and Life-Coat™.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVisual and photographic 1¼\" UHC-L Nebula filter with highest transmission\u003c\/li\u003e\n\u003cli\u003eUltra High Contrast L Filter blocks city lights and increases contrast of nebula and comets (C2 lines)\u003c\/li\u003e\n\u003cli\u003eCan be used as LED-opimized Luminance filter for RGB-Imaging wtih skyglow suppression\u003c\/li\u003e\n\u003cli\u003eBlue transmission optimized to block blueish skyglow caused by LED car- and streetlights.\u003c\/li\u003e\n\u003cli\u003eCreates a much brighter image than a conventional Nebula filter\u003c\/li\u003e\n\u003cli\u003eIdeal for deep-sky observers. This UHC-L filter is the perfect visual complement to narrowband OIII filters.\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBaader UHC-L Nebula filter with highest transmission, realistic star colors, also usable as highly effective LED-optimized luminance filter for LRGB imaging.\u003c\/h4\u003e\n\u003cp\u003eThe Baader UHC-L filter is the classic allround \"light pollution rejection filter\", but now also blocked against the main LED emissions in the blue part of the spectrum. The passband curve corresponds to a wide dual-band filter without distorting star colors. The two passbands transmitt all light emitted by the known gas nebulae (the H-alpha and H-beta lines of fluorescent hydrogen as well as the OIII line of oxygen), while both the atmospheric most disturbing stray light from LED lamps and intense bluish car headlights as well as further stray light from classical street lamps and the natural night sky glow (airglow\/skyglow) of the atmosphere are blocked to a large extent. At the same time, the UHC-L filter is coated with latest technology (CMOS-optimized) and therefore blocks false light much more effective than all previous UHC filters.\u003c\/p\u003e\n\u003ch2\u003eUse of the UHC-L filter\u003c\/h2\u003e\n\u003cp\u003eThe application of the UHC-L happens mainly in visual and photographic observation of emission nebulae (star forming regions, planetary nebulae, supernova remnants) under medium to highly polluted skies. Its use is also interesting for comet observation: It passes the OIII line at 501nm as well as the two C2 lines at 511nm and 514nm which are characteristic for the gas tail of many comets.\u003c\/p\u003e\n\u003cp\u003eThis UHC-L filter is the successor of the well-proven plane-optical polished Baader UHC-S filter. It consequently complements it with the advantages of CMOS optimization (no disturbing halos, blackened filter edges, Life-Coat™-coating) while providing an improved transmission spectrum adapted to also cover modern LED light pollution. It provides a brighter image than many classic LPR (Light Pollution Rejection) filters and is therefore not only suitable for large, fast instruments, but also for smaller telescopes collecting less light, where a large exit pupil cannot be achieved. This applies for long-focal length telescopes as well as for small aperture telescopes that only have an eyepiece socket for 1.25\" eyepieces. Unlike the single line or dual line narrowband filters, the image is also bright enough for high magnification, while not diminishing the number of stars.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eFor deep-sky observers, therefore, this UHC-L filter is the perfect visual complement to narrowband OIII filters.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe UHC-L filter is also\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eexcellent for photographic use\u003c\/strong\u003e. It does not just block polluting terrestrial light sources, but at the same time it serves as a luminance filter (L-filter), since it blocks all UV and IR transmission like a UV\/IR cut filter. An additional UV\/IR-cut filter is therefore not necessary: Cameras without a built-in UV\/IR-cut filter thus deliver significantly sharper images on refracting telescopes. Both classical photographers and users of EAA\/LiveStacking do benefit from the increased sharpness of stars and better contrast of nebulae, as well as the improved transmittance in H-alpha.\u003c\/p\u003e\n\u003cp\u003eLike all Baader CMOS-optimized filters, Baader UHC-L filters likewise are plano-optically polished, with ultra-hard, sputtered dielectric coatings. Even a one-hour bath in boiling water cannot harm these filters! They are scratch-resistant and can be cleaned as often as desired.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eThe Baader UHC-L \/ Ultra-L-Booster Filter offers all the advantages of the CMOS-opitmized Baader filters:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased contrast, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/uhc-l-ultra-l-booster-filter-31mm-0a1_928x576_07cdff75-c6ba-463b-a37c-91c94f3c7a59.webp?v=1701965652\u0026amp;width=700\" width=\"551\" height=\"335\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eMANUFACTURER\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eSize\u003cbr\u003e\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\n\u003cp\u003e1.25\"\u003cbr\u003e2\"\u003cbr\u003e31 mm\u003cbr\u003e36 mm\u003cbr\u003e50.4 mm\u003cbr\u003e50 x 50 mm\u003cbr\u003e65 x 65 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eNET WEIGHT (KG)\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.006 - 0.032\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eCOLOUR\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eTRANSMISSION RANGE\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003cspan\u003emultiple bands (see spectral image)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 mm - 3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eAR-COATING\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eSPECIAL FEATURES\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eCMOS-optimized with\u003cspan\u003e \u003c\/span\u003eLife-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eFILTER USAGE\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003cspan\u003eContrast Enhancement, Light Pollution Reduction, Luminance\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eFILTER MOUNTED\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.25\" \u0026amp; 2\" Mounted (LPFC 6mm) \/ rest unmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003e\u003cspan\u003eTYPE OF FILTER\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1499.53px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: left;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: left;\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBaader UHC-L \/ L-Booster Filter\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"centerImage\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"pdp-content-description rte active\" data-pdp-tab-content=\"description\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":49768300118168,"sku":"pjr1788035051031","price":63.04,"currency_code":"USD","in_stock":true},{"title":"2\"","offer_id":49768300150936,"sku":"zly1788035051032","price":107.1,"currency_code":"USD","in_stock":true},{"title":"31mm","offer_id":49768300183704,"sku":"xin1788035051033","price":95.97,"currency_code":"USD","in_stock":true},{"title":"36mm","offer_id":49768300216472,"sku":"izo1788035051034","price":111.85,"currency_code":"USD","in_stock":true},{"title":"50.4mm","offer_id":49768300249240,"sku":"lkk1788035051035","price":136.37,"currency_code":"USD","in_stock":true},{"title":"50 x 50mm","offer_id":49768300282008,"sku":"xfl1788035051036","price":226.04,"currency_code":"USD","in_stock":true},{"title":"65 x 65mm","offer_id":49768300314776,"sku":"lmn1788035051037","price":275.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/1832\/4888\/files\/baader-uhc-l-ultra-l-booster-filter-cmos-optimized_1.webp?v=1788035057"}],"url":"https:\/\/www.candlewoodcorner.shop\/collections\/light-pollution-cls-and-nebula-filters-for-telesco.oembed","provider":"My Store","version":"1.0","type":"link"}