{"product_id":"askar-colourmagic-duo-band-c-filter-package-ha-oiii-sii-oiii-filters-2","title":"Askar ColourMagic 2\" Duo-Band C Filter Package - Ha\/OIII \u0026 SII\/OIII Filters - CM-DUO-C-PKG","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSave some money \u0026amp; enhance SII, OIII \u0026amp; Ha with this Color Magic 2\" Filter Set.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDesigned for deep-sky imaging of emission nebulae with a color camera, the Askar ColourMagic C1 \u0026amp; C2 Duo-Band Filter Package permits SII, H-alpha and Oxygen III wavelengths through while blocking those that contribute to light pollution.  The C1 filter enhances Ha \u0026amp; OIII, while the C2 filter in this package enhances SII \u0026amp; OIII.  Use them together for optimum results!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/Askar_C_Comparison_480x480.jpg?v=1705519076\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"524\" height=\"448\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe peak transmission is 90% at the center wavelength of 672nm, 656.6nm, \u0026amp; 500.7nm, .  This combination will enhance contrast, darken the background sky, and produce better images of emission nebulae.  \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWhile these filters are similar to the D1 duo-narrowband filters, the C filters are improved as far as peak transmission (90% vs 85%) and filter thickness (2mm vs 1.85mm).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eColourMagic C Duo-Band Filter Package Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFWHM:  OIII = 35nm+\/-5nm, Ha = 15nm+\/-3nm, SII = 15nm+\/-3nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCWL:  500.7nm \u0026amp; 656.6nm, 672nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003ePeak Transmittance:  90%\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFilter Thickness:  2 +\/- 0.05mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBarrier Property:  OD3 @ 200-1000nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSurface Finish:  60\/40\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":40497190568049,"sku":"ASK-CM-DUO-C-PKG","price":203.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/ColourMagic_Filter_Package.png?v=1776459032","url":"https:\/\/khanscope.com\/en-fr\/products\/askar-colourmagic-duo-band-c-filter-package-ha-oiii-sii-oiii-filters-2","provider":"Khan Scope Centre","version":"1.0","type":"link"}