{"product_id":"celestron-oxygen-iii-narrowband-filter-1-25","title":"Celestron 1.25\" Oxygen III Narrowband Filter","description":"\u003ch2\u003e\u003cstrong\u003eCelestron 1.25” OIII Narrowband Filter\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eReveal Hidden Nebula Details with Exceptional Contrast\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eCelestron 1.25” OIII (Oxygen-III) Narrowband Filter\u003c\/strong\u003e is specially designed to isolate only the two critical \u003cstrong\u003edoubly-ionised oxygen emission lines\u003c\/strong\u003e at \u003cstrong\u003e496nm and 501nm\u003c\/strong\u003e—the spectral signature of many \u003cstrong\u003eplanetary and emission nebulae\u003c\/strong\u003e. By blocking the rest of the visible spectrum, this filter dramatically improves contrast, allowing faint nebulosity to stand out against a pitch-black sky.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIdeal for Observing Iconic Nebulae\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEnhances visibility of subtle structure in nebulae like the \u003cstrong\u003eVeil, Ring, Dumbbell, Crescent, and Orion\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCuts through light pollution and moonlight for improved deep-sky performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerfect for \u003cstrong\u003eurban observers\u003c\/strong\u003e or \u003cstrong\u003edark-sky trips\u003c\/strong\u003e alike\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdvanced Optical Coating Technology\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eUtilises a \u003cstrong\u003evacuum-deposited, ultra-hard multilayer coating\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEffectively blocks the visual spectrum from \u003cstrong\u003e400nm to 700nm\u003c\/strong\u003e, isolating only OIII light\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrevents \u003cstrong\u003ecolour fringing and halos\u003c\/strong\u003e around bright stars—common issues with lower-grade filters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDelivers clean, high-contrast views without distortion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eBuilt for Durability and Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eStandard \u003cstrong\u003e1.25” filter size\u003c\/strong\u003e, fits most telescope eyepieces and filter wheels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision-machined \u003cstrong\u003eanodised aluminium housing\u003c\/strong\u003e ensures long-term reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor amateur astronomers looking to bring out the finest detail in nebulae—especially under light-polluted skies—the \u003cstrong\u003eCelestron 1.25” OIII Narrowband Filter\u003c\/strong\u003e is a valuable upgrade to your optical toolkit.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":55897340936566,"sku":"050234936231","price":114.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2235\/3014\/files\/celestron-iii-narrowband-filter-1-25-93623-cgl.webp?v=1766072271","url":"https:\/\/welshastronomy.co.uk\/products\/celestron-oxygen-iii-narrowband-filter-1-25","provider":"The Welsh Astronomy Centre","version":"1.0","type":"link"}