{"product_id":"celestron-origin-nebula-filter","title":"Celestron Nebula Filter for Origin Intelligent Home Observatory","description":"\u003ch2\u003eHigh-Contrast Nebula Imaging with Celestron Origin\u003c\/h2\u003e\n\n  \u003cp\u003eThe Celestron Nebula Filter for Origin is a specialised Hα-Hβ-OIII imaging filter engineered for the fast f\/2.2 RASA optics in the Origin Intelligent Home Observatory. It transmits the principal emission wavelengths produced by many nebulae while blocking much of the artificial light pollution and natural skyglow that can wash out image contrast.\u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eDesigned specifically for Celestron Origin’s f\/2.2 RASA optical system\u003c\/li\u003e\n    \u003cli\u003eTransmits Hα at 656nm, Hβ at 486nm and OIII at 496\/501nm\u003c\/li\u003e\n    \u003cli\u003eAt least 85% transmission at the key nebula wavelengths\u003c\/li\u003e\n    \u003cli\u003eLess than 0.5% transmission outside the intended passbands\u003c\/li\u003e\n    \u003cli\u003eSchott B270 optical glass with dichroic and anti-reflection coatings\u003c\/li\u003e\n    \u003cli\u003eFits directly into Origin’s filter drawer without an additional adapter\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93669_Nebula_Filter_for_Origin_01.jpg?v=1703003790\u0026amp;width=1600\" alt=\"Celestron H-alpha H-beta OIII Nebula Filter for the Origin telescope\" loading=\"eager\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003ePurpose-Designed for Fast f\/2.2 RASA Optics\u003c\/h2\u003e\n\n  \u003cp\u003eLight reaches a fast RASA focal plane at steeper angles than it does in many conventional telescope designs. Narrower filters can experience a spectral shift that reduces transmission at the required wavelengths. Celestron designed this filter’s passbands around Origin’s f\/2.2 light cone so that useful nebula emission is not inadvertently blocked.\u003c\/p\u003e\n\n  \u003cp\u003eThe filter is individually tested at the factory. A spectral transmission graph for the specific filter is supplied in the package.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93669_Nebula_Filter_for_Origin_07.jpg?v=1703003789\u0026amp;width=1600\" alt=\"Celestron Origin Nebula Filter transmission graph for H-beta OIII and H-alpha wavelengths\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eBest Targets and When to Remove the Filter\u003c\/h2\u003e\n\n  \u003cp\u003eThe filter is intended for emission nebulae such as the North America Nebula, Lagoon Nebula, Orion Nebula and similar Hα-Hβ-OIII targets. The contrast improvement is most obvious under urban and suburban light pollution, although blocking natural skyglow can also help under darker skies.\u003c\/p\u003e\n\n  \u003cp\u003eDo not use this filter for broadband targets such as galaxies, star clusters or ordinary star fields. For those targets, remove the Nebula Filter, reinstall Origin’s clear optical window and refocus the telescope.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93669_Nebula_Filter_for_Origin_05.jpg?v=1703003789\u0026amp;width=1600\" alt=\"Installing the Celestron Nebula Filter in the Origin filter drawer\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eDirect Installation in the Origin Filter Drawer\u003c\/h2\u003e\n\n  \u003cp\u003eRemove the Origin dew shield, pull out the filter drawer and carefully unthread the clear optical window by holding its cell. Thread the Nebula Filter into the same side of the drawer, reinstall the drawer and dew shield, then run the Origin autofocus function.\u003c\/p\u003e\n\n  \u003cp\u003eHandle both filters only by their cells. Installing the filter from the wrong side can prevent the drawer from seating correctly.\u003c\/p\u003e\n\n  \u003ch2\u003eOptical Construction and Storage\u003c\/h2\u003e\n\n  \u003cp\u003eThe 2mm-thick Schott B270 glass is mounted in a black-anodised aluminium cell with a knurled edge. Multi-layer anti-reflection coatings help suppress unwanted reflections. Store the filter—or Origin’s removed clear window—in the supplied foam-lined plastic case when it is not installed.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93669_Nebula_Filter_for_Origin_06.jpg?v=1703003790\u0026amp;width=1600\" alt=\"Celestron Origin Nebula Filter stored in its protective plastic case\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat Is Included?\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eCelestron Nebula Filter for Origin\u003c\/li\u003e\n    \u003cli\u003eIndividual spectral transmission graph\u003c\/li\u003e\n    \u003cli\u003eFoam-lined plastic storage case\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e The Origin telescope, filter drawer and clear optical window are not included with this filter.\u003c\/p\u003e\n\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ch3\u003eOptical and Mechanical Specifications\u003c\/h3\u003e\n\n  \u003cdiv style=\"overflow-x:auto;margin:20px 0;\"\u003e\n    \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;width:40%;\"\u003eFilter type\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eHα-Hβ-OIII multi-bandpass nebula imaging filter\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eGlass\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSchott B270\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eGlass thickness\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e2mm (0.078 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eFilter diameter\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eClear aperture\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e24mm (0.94 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eKey transmitted wavelengths\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e486nm, 496\/501nm and 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eTransmission at key wavelengths\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e85% or greater\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eTransmission outside the passbands\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eLess than 0.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eCoatings\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDichroic multi-bandpass and multi-layer anti-reflection coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eFilter cell\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eBlack-anodised aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eThreads\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eM28.5 × 0.6; standard 1.25-inch filter thread\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eCell height\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e6mm total: 4mm shoulder and 2mm thread\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth style=\"text-align:left;padding:10px;border:1px solid #ddd;background:#f5f5f5;\"\u003eCompatibility\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eCelestron Origin Intelligent Home Observatory f\/2.2 RASA optical system\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eImportant Safety Information\u003c\/h2\u003e\n\n  \u003cdiv style=\"background:#fff4e5;border-left:4px solid #f28c00;padding:16px;margin:20px 0;\"\u003e\n    \u003cp style=\"margin-top:0;\"\u003e\u003cstrong\u003eWarning: This is not a solar filter.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eNever use this filter to observe or image the Sun and never point Celestron Origin at the Sun without appropriate specialist solar equipment covering the complete front aperture.\u003c\/p\u003e\n    \u003cp style=\"margin-bottom:0;\"\u003eAvoid touching the optical surfaces. Remove loose dust with a blower or optical brush and follow the manufacturer’s cleaning instructions when wet cleaning is necessary.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eInstruction Manual\u003c\/h2\u003e\n\n  \u003cp\u003eThe official manual includes installation, care and specification information in English, French, German, Italian and Spanish.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align:center;margin:25px 0;\"\u003e\n    \u003ca href=\"https:\/\/celestron-site-support-files.s3.us-east-1.amazonaws.com\/support_files\/93669_Nebula_Filter_for_Origin_Manual_5_Languages.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display:inline-block;background:#111;color:#fff;padding:14px 22px;margin:6px;text-decoration:none;border-radius:4px;font-weight:600;\"\u003eView \/ Download Origin Nebula Filter Manual\u003c\/a\u003e\n  \u003c\/div\u003e\n\n","brand":"Celestron","offers":[{"title":"Default Title","offer_id":55642072187256,"sku":null,"price":199.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/01-origin-nebula-filter.jpg?v=1787827042","url":"https:\/\/www.darkclearskies.co.uk\/products\/celestron-origin-nebula-filter","provider":"Dark Clear Skies ","version":"1.0","type":"link"}