{"product_id":"askar-colourmagic-ultra-2-duo-band-e2-filter-sii-oiii-cm-duo-e2","title":"Askar ColourMagic Ultra 2\" Duo-Band E2 Filter - SII + OIII - CM-DUO-E2","description":"\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/E2_Banner.jpg?v=1756236274\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for deep-sky imaging with color astro cameras, t\u003cspan\u003ehe Askar ColourMagic Ultra E2 filter, as the name suggests, includes \"Ultra\" halo control capability. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen shooting deep-sky galaxies with colour cameras, a duo-narrowband filter in the Hα and OⅢ bands is often used; whereas with a mono camera, a narrowband filter in the Hα, SⅡ and OⅢ bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by using the ColourMagic Ultra E2 Duo-narrowband filter (OⅢ+SⅡ).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar ColourMagic Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) has an ultra-high transmittance of over 85% at its center wavelength (500.7nm and 672nm). It can effectively enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eColourMagic E2 Ultra Duo-Band Filter Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFWHM:  SII = 4.0 +\/- 0.3nm, OIII = 3.7nm+\/- 0.3nm\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eCWL:  500.7nm \u0026amp; 672nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePeak Transmittance:  85%\u003c\/p\u003e\n\u003cp\u003eFilter Thickness:  1.85 +\/- 0.05mm\u003c\/p\u003e\n\u003cp\u003eBarrier Property:  ≥OD5 @ 200-1000nm\u003c\/p\u003e\n\u003cp\u003eSurface Finish:  60\/40\u003c\/p\u003e\n\u003cp\u003eParallelism: 30\"\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":42305424195697,"sku":"ASK-CM-DUO-E2","price":546.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/E2_Part_of_Filter_Package_3634379b-c739-42c5-be07-e7ea296071cc.png?v=1776459164","url":"https:\/\/khanscope.com\/fr-fr\/products\/askar-colourmagic-ultra-2-duo-band-e2-filter-sii-oiii-cm-duo-e2","provider":"Khan Scope Centre","version":"1.0","type":"link"}