{"product_id":"celestron-narrowband-hα-hβ-oiii-imaging-filter-rasa-8","title":"Celestron H-Alpha H-Beta OIII Imaging Filter for RASA 8 | Nebula Filter","description":"\u003ch2\u003eCelestron \u003cmeta charset=\"utf-8\"\u003eH-alpha H-beta OIII Imaging Filter, Rowe-Ackermann Schmidt Astrograph (RASA) 8\u003c\/h2\u003e\n\u003cp\u003eBring out the finest detail in emission nebulae with Celestron’s Hα-Hβ-OIII Imaging Filter, precision-engineered for the 8” Rowe-Ackermann Schmidt Astrograph (RASA). This narrowband filter dramatically enhances contrast and clarity in your deep-sky images by selectively passing light at the key wavelengths emitted by nebulae—H-alpha, H-beta, and doubly ionised oxygen (OIII)—while effectively blocking unwanted light pollution.\u003c\/p\u003e\n\u003cp\u003eWhether you're imaging from an urban backyard or a remote dark-sky site, this filter helps reveal delicate nebular structures that would otherwise be lost in background glow.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Transmission at Critical Wavelengths\u003c\/strong\u003e\u003cbr\u003eAllows more than 85% light throughput at H-alpha (656nm), H-beta (486nm), and OIII (496nm \u0026amp; 501nm) lines—maximising nebula brightness and contrast.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExcellent Light Pollution Rejection\u003c\/strong\u003e\u003cbr\u003eSuppresses over 99.5% of other visible light, significantly reducing skyglow and interference from artificial lighting sources such as sodium and mercury vapour lamps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePurpose-Built for Nebula Imaging\u003c\/strong\u003e\u003cbr\u003ePerfect for photographing emission nebulae including the Orion Nebula (M42), North America Nebula (NGC 7000), Lagoon Nebula (M8), and the Carina Nebula (NGC 3372).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTailored for Fast Optics\u003c\/strong\u003e\u003cbr\u003eDesigned to work optimally with the fast f\/2.0 light cone of the RASA 8\", preserving sharpness and image quality across the entire field.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat to Expect\u003c\/h3\u003e\n\u003cp\u003eThis filter is ideal for astrophotographers who want to image emission nebulae in rich detail, even under moderately light-polluted skies. It is not recommended for broadband deep-sky targets such as galaxies or open clusters, as these objects emit across a wider range of wavelengths that the filter blocks.\u003c\/p\u003e\n\u003ch3\u003eEnhance Your Setup\u003c\/h3\u003e\n\u003cp\u003ePair this filter with a dedicated astro camera for best results, and consider combining it with an automated filter wheel or monochrome imaging system for advanced workflows. The Hα-Hβ-OIII Imaging Filter offers a cost-effective way to transform your imaging setup and make the most of your RASA’s fast optics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAchieve cleaner, higher-contrast images with bold nebular detail. Whether you're just getting started or refining a professional imaging rig, this filter gives your 8” RASA the edge in narrowband astrophotography.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":55897344278902,"sku":"050234936194","price":299.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2235\/3014\/files\/Celestron-H-alpha-H-beta-OIII-Imaging-Filter-RASA-8-Product-Photo-1.webp?v=1757513855","url":"https:\/\/welshastronomy.co.uk\/products\/celestron-narrowband-h%ce%b1-h%ce%b2-oiii-imaging-filter-rasa-8","provider":"The Welsh Astronomy Centre","version":"1.0","type":"link"}