{"product_id":"touptek-2inch-dual-narrowband-filter-ha-oiii-5nm","title":"ToupTek PureSight A1 2-inch 5NM F\/3.2 Dual Narrowband Filters Ha+OIII","description":"\u003cdiv class=\"product-description\"\u003e\n\n\u003ch2\u003e\u003cstrong\u003eToupTek PureSight A1 2\" Dual Narrowband Filter (Ha + OIII)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUnlock deep-sky detail even under heavy light pollution.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003c!-- HERO IMAGE --\u003e\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-01.jpg?v=1777465204\" alt=\"ToupTek PureSight A1 filter\"\u003e\n\u003c\/p\u003e\n\n\u003ch3\u003e🌌 Designed for Modern Astrophotography\u003c\/h3\u003e\n\u003cp\u003e\nEngineered for one-shot colour cameras, the PureSight A1 isolates the two most important nebula emission lines:\n\u003cstrong\u003eHydrogen-Alpha (656.3nm)\u003c\/strong\u003e and \u003cstrong\u003eOIII (500.7nm)\u003c\/strong\u003e.\nPerfect for imaging from suburban gardens or light-polluted skies.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🎯 Ultra-Narrow 5nm Precision\u003c\/h3\u003e\n\u003cp\u003e\nWith a tight \u003cstrong\u003e5nm bandpass\u003c\/strong\u003e, this filter surgically removes unwanted wavelengths while preserving critical nebula signal.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-02.jpg?v=1777465204\" alt=\"Spectral graph\"\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003ePinpoint contrast on emission nebulae\u003c\/li\u003e\n\u003cli\u003eMassively reduced skyglow\u003c\/li\u003e\n\u003cli\u003eEnhanced colour separation in OSC cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🚫 Extreme Light Pollution Rejection\u003c\/h3\u003e\n\u003cp\u003e\nFeaturing \u003cstrong\u003eOD5+ blocking\u003c\/strong\u003e, the filter removes \u003cstrong\u003e99.999% of unwanted light\u003c\/strong\u003e — including streetlights, LED glow, and urban haze.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-04.jpg?v=1777465204\" alt=\"Before and after comparison\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eResult:\u003c\/strong\u003e darker backgrounds, higher contrast, cleaner data.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e✨ Premium Optical Construction\u003c\/h3\u003e\n\u003cp\u003e\nBuilt using \u003cstrong\u003efused silica glass\u003c\/strong\u003e and advanced \u003cstrong\u003eIAD coating technology\u003c\/strong\u003e for durability and performance.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-03.jpg?v=1777465204\" alt=\"Filter detail\"\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u0026gt;90% transmission efficiency\u003c\/li\u003e\n\u003cli\u003eLow halo \u0026amp; ghosting suppression\u003c\/li\u003e\n\u003cli\u003eSharp star profiles\u003c\/li\u003e\n\u003cli\u003e60\/40 surface quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e⚡ Optimised for Fast Optics\u003c\/h3\u003e\n\u003cp\u003e\nDesigned for modern fast systems:\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eIdeal from \u003cstrong\u003eF\/3.2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eStable performance down to \u003cstrong\u003eF\/2.8\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-05.jpg?v=1777465204\" alt=\"Fast optics visual\"\u003e\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🔧 Built for Real Setups\u003c\/h3\u003e\n\u003cp\u003e\nPrecision CNC aluminium housing with matte black finish reduces reflections and improves durability.\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-06.jpg?v=1777465205\" alt=\"Filter case\"\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eStandard \u003cstrong\u003eM48 x 0.75\u003c\/strong\u003e thread\u003c\/li\u003e\n\u003cli\u003eFits filter wheels \u0026amp; drawers\u003c\/li\u003e\n\u003cli\u003eEffective aperture: 43.9mm\u003c\/li\u003e\n\u003cli\u003eFrame height: 5mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🔭 Compatibility\u003c\/h3\u003e\n\u003cp\u003e\nWorks seamlessly with:\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-07.jpg?v=1777465204\" alt=\"Compatible telescopes\"\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eFull-frame \u0026amp; APS-C cameras\u003c\/li\u003e\n\u003cli\u003eFilter wheels (5 \u0026amp; 7 position)\u003c\/li\u003e\n\u003cli\u003e2\" filter drawers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e📊 Transmission Curve\u003c\/h3\u003e\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-09.jpg?v=1777465203\" alt=\"Transmission curve\"\u003e\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🛠 Easy Installation\u003c\/h3\u003e\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-10.jpg?v=1777465204\" alt=\"Installation guide\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003e\nThread side faces the sensor. Installs in seconds into any standard 2\" system.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e📦 What’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × PureSight A1 Dual Narrowband Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e📐 Key Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBandpass: 5nm (Ha \u0026amp; OIII)\u003c\/li\u003e\n\u003cli\u003eTransmission: \u0026gt;90%\u003c\/li\u003e\n\u003cli\u003eBlocking: OD5+ (200–1100nm)\u003c\/li\u003e\n\u003cli\u003eMaterial: Fused silica\u003c\/li\u003e\n\u003cli\u003eThickness: 2mm\u003c\/li\u003e\n\u003cli\u003eParallelism: ≤30\"\u003c\/li\u003e\n\u003cli\u003eThread: M48 x 0.75\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e🚀 Why Choose This Filter?\u003c\/h3\u003e\n\u003cp\u003e\nIf you image from the UK (or anywhere with light pollution), this is one of the most effective upgrades you can make.\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ Shoot nebulae from your garden\u003c\/li\u003e\n\u003cli\u003e✔ Dramatically improve contrast\u003c\/li\u003e\n\u003cli\u003e✔ Perfect for OSC cameras\u003c\/li\u003e\n\u003cli\u003e✔ Built for fast modern astrographs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTurn washed-out skies into deep space detail.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"ToupTek","offers":[{"title":"Default Title","offer_id":55542659678584,"sku":"LS03406000000449","price":289.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/101087-01.jpg?v=1777465204","url":"https:\/\/www.darkclearskies.co.uk\/products\/touptek-2inch-dual-narrowband-filter-ha-oiii-5nm","provider":"Dark Clear Skies ","version":"1.0","type":"link"}