{"product_id":"optolong-sii-65nm-imaging-narrowband-filter","title":"Optolong SII 6.5nm Imaging Narrowband Filter","description":"\u003ch2\u003eOptolong SII 6.5nm Imaging Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both highand low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO kit (H-alpha7nm, OIII 6.5nm and SII6.5nm) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eNarrowband 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\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20210703\/3427717cb1f3057669a8ab02ddfd6cd6.png?width=700\" width=\"545\" height=\"317\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲ The SII6.5nm filter line is shown in\u003cstrong\u003e\u003cspan style=\"color: #0d5bc9;\"\u003e BLUE.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg?width=700\" width=\"597\" height=\"98\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":48411392737538,"sku":"sam1787937260442","price":104.28,"currency_code":"USD","in_stock":true},{"title":"2\"","offer_id":48411392770306,"sku":"ydk1787937260443","price":164.19,"currency_code":"USD","in_stock":true},{"title":"31mm","offer_id":48411392803074,"sku":"ctb1787937260444","price":135.3,"currency_code":"USD","in_stock":true},{"title":"36mm","offer_id":48411392835842,"sku":"zky1787937260445","price":127.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/3862\/0930\/files\/optolong-sii-65nm-imaging-narrowband-filter_1.png?v=1787937270","url":"https:\/\/welcomingwillow.shop\/products\/optolong-sii-65nm-imaging-narrowband-filter","provider":"My Store","version":"1.0","type":"link"}