{"product_id":"optolong-ir-pass685-planetary-filter","title":"Optolong IR Pass685 Planetary Filter","description":"\u003ch2\u003eOptolong IR Pass685 Planetary Filter\u003c\/h2\u003e\n\u003cp\u003eOptolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/p\u003e\n\u003cp\u003eThe sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAdditionnal Features:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eIR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSbustrate:\u003c\/strong\u003e B270\u003cbr\u003e\u003cstrong\u003eThickness:\u003c\/strong\u003e 1.85mm\u003cbr\u003e\u003cstrong\u003eTave:\u003c\/strong\u003e  T\u0026gt;90%\u003cbr\u003e\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 350-1050nm\u003cbr\u003e\u003cstrong\u003eBlcoking depth:\u003c\/strong\u003e light pollution  line blocking \u0026gt;99%\u003cbr\u003e\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 60\/40\u003cbr\u003e\u003cstrong\u003eTransmitted Wavefront RMS:\u003c\/strong\u003e λ\/4\u003cbr\u003e\u003cstrong\u003eParallelism:\u003c\/strong\u003e 30s\u003c\/p\u003e\n\u003cp\u003e\u003cimg data-ll-status=\"loaded\" class=\"lazyloaded\" alt=\"\" src=\"https:\/\/optolong.com\/uploads\/images\/20200728\/f38d04404d461d5c64dd2159dc025330.png\" width=\"450\" height=\"247\"\u003e\u003c\/p\u003e\n\u003cp\u003eHow to read the chart?\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","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697238180069,"sku":"OL-IR685-1.25","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697238212837,"sku":"OL-IR685-2","price":160.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-ir-pass685-planetary-filter-astronomy-plus_cc837c01-acfa-4006-bfa3-c5fd37e31402.png?v=1690487293","url":"https:\/\/istronomyplus.com\/products\/optolong-ir-pass685-planetary-filter","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}