{"product_id":"svbony-1-25-2-eos-c-cls-light-pollution-broadband-filters","title":"SVBONY 1.25''\/2'' EOS-C CLS Light Pollution Broadband Filters","description":"\u003ch2\u003eSVBONY 1.25''\/2''\/EOS-C CLS Light Pollution Broadband Filters\u003c\/h2\u003e\n\u003cp\u003eElectron beam gun evaporation with Ion assisted deposition coating technology for durability and resistance to scratching;as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off band.\u003cbr\u003e90% transmission of main nebula emission lines;such as Ha 656nm;OIII\u003c\/p\u003e\n\u003cp\u003e496nm;500nm;SII672nm and H-beta 486nm.\u003cbr\u003e0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 589nm;Hg 435nm and 578nm.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eSuitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe SVBONY City Light Suppression broadband filter is designed to improve the visibility of various Deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003cbr\u003e\u003cbr\u003e2. Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the Svbony CLS filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area\u003cbr\u003e\u003cbr\u003e3. Light pollution filter do not eliminate the effects of light pollution or increase the object's brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_60e442fd-5c66-4334-875d-157f06614813.jpg?v=1759433200\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_2053e485-f631-4ab0-83d0-0521444c8031.jpg?v=1759433211\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: border-box; border-collapse: collapse; margin: 0px auto 15px; width: 1240px; border-spacing: 0px; color: #424242; font-family: Poppins, Helvetica, Tahoma, Arial, serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: border-box;\"\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eModel \u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155A\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155B\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.25‘’\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e2‘’\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eEOS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eStandard M28.5*0.6\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eStandard M48*0.75\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eCanon EOS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003ethickness\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\" colspan=\"3\"\u003eCity Light Suppression Filter (CLS Filter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSVBONY 1.25''\/2'' EOS-C CLS Light Pollution Broadband Filters\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25\"","offer_id":43971230499045,"sku":"SVB-F9155A","price":31.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43971230531813,"sku":"SVB-F9155B","price":53.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C","offer_id":43971230564581,"sku":"SVB-F9155D","price":73.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-1-25-2-eos-c-cls-light-pollution-broadband-filters-astronomy-plus.webp?v=1690489343","url":"https:\/\/istronomyplus.com\/products\/svbony-1-25-2-eos-c-cls-light-pollution-broadband-filters","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}