{"product_id":"explore-scientific-s-ii-12-nm-narrowband-filter-2-inch-310110","title":"Explore Scientific S II 12 nm Narrowband Filter 2-Inch – 310110","description":"\u003ch1 id=\"description\"\u003e\u003c\/h1\u003e\n\u003cp data-start=\"833\" data-end=\"1245\"\u003eThe \u003cstrong data-start=\"861\" data-end=\"908\"\u003eExplore Scientific S II 12 nm 2-inch Filter\u003c\/strong\u003e is a narrowband sulfur filter engineered to isolate the \u003cstrong data-start=\"965\" data-end=\"1011\"\u003esingly ionized sulfur (S II) emission line\u003c\/strong\u003e commonly found in emission nebulae and supernova remnants. With a 12 nm passband, this filter provides effective background suppression while maintaining strong signal transmission, making it suitable for advanced narrowband imaging.\u003c\/p\u003e\n\u003cp data-start=\"1247\" data-end=\"1265\"\u003e\u003cstrong data-start=\"1247\" data-end=\"1263\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1266\" data-end=\"2064\"\u003e\n\u003cli data-start=\"1266\" data-end=\"1370\"\u003e\n\u003cp data-start=\"1268\" data-end=\"1370\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1298\"\u003e12 nm Narrowband Passband:\u003c\/strong\u003e Optimized to isolate S II emission while reducing background skyglow.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1371\" data-end=\"1514\"\u003e\n\u003cp data-start=\"1373\" data-end=\"1514\"\u003e\u003cstrong data-start=\"1373\" data-end=\"1404\"\u003eAstrophotography Optimized:\u003c\/strong\u003e Ideal for monochrome imaging and narrowband combinations such as the Hubble palette (S II, H-alpha, O III).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1515\" data-end=\"1626\"\u003e\n\u003cp data-start=\"1517\" data-end=\"1626\"\u003e\u003cstrong data-start=\"1517\" data-end=\"1547\"\u003eImproved Nebular Contrast:\u003c\/strong\u003e Enhances faint sulfur structures in emission nebulae and supernova remnants.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1627\" data-end=\"1779\"\u003e\n\u003cp data-start=\"1629\" data-end=\"1779\"\u003e\u003cstrong data-start=\"1629\" data-end=\"1668\"\u003eHigh Transmission Optical Coatings:\u003c\/strong\u003e Advanced multi-layer coatings maximize throughput at the target wavelength while preserving image sharpness.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1780\" data-end=\"1904\"\u003e\n\u003cp data-start=\"1782\" data-end=\"1904\"\u003e\u003cstrong data-start=\"1782\" data-end=\"1810\"\u003ePrecision Optical Glass:\u003c\/strong\u003e Optically polished glass substrates ensure consistent performance across the field of view.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1905\" data-end=\"2064\"\u003e\n\u003cp data-start=\"1907\" data-end=\"2064\"\u003e\u003cstrong data-start=\"1907\" data-end=\"1938\"\u003eDurable 2-Inch Filter Cell:\u003c\/strong\u003e Precision-machined, threaded metal housing fits standard 2-inch eyepieces, diagonals, filter wheels, and imaging accessories.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2066\" data-end=\"2086\"\u003e\u003cstrong data-start=\"2066\" data-end=\"2084\"\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2087\" data-end=\"2453\"\u003e\n\u003cli data-start=\"2087\" data-end=\"2147\"\u003e\n\u003cp data-start=\"2089\" data-end=\"2147\"\u003e\u003cstrong data-start=\"2089\" data-end=\"2105\"\u003eFilter Type:\u003c\/strong\u003e S II (Singly Ionized Sulfur) Narrowband\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2148\" data-end=\"2176\"\u003e\n\u003cp data-start=\"2150\" data-end=\"2176\"\u003e\u003cstrong data-start=\"2150\" data-end=\"2164\"\u003eBandwidth:\u003c\/strong\u003e \u003cstrong data-start=\"2165\" data-end=\"2174\"\u003e12 nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2177\" data-end=\"2208\"\u003e\n\u003cp data-start=\"2179\" data-end=\"2208\"\u003e\u003cstrong data-start=\"2179\" data-end=\"2195\"\u003eBarrel Size:\u003c\/strong\u003e \u003cstrong data-start=\"2196\" data-end=\"2206\"\u003e2-inch\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2209\" data-end=\"2269\"\u003e\n\u003cp data-start=\"2211\" data-end=\"2269\"\u003e\u003cstrong data-start=\"2211\" data-end=\"2227\"\u003ePrimary Use:\u003c\/strong\u003e Emission nebulae and supernova remnants\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2270\" data-end=\"2326\"\u003e\n\u003cp data-start=\"2272\" data-end=\"2326\"\u003e\u003cstrong data-start=\"2272\" data-end=\"2297\"\u003eOptical Construction:\u003c\/strong\u003e Multi-coated optical glass\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2327\" data-end=\"2431\"\u003e\n\u003cp data-start=\"2329\" data-end=\"2431\"\u003e\u003cstrong data-start=\"2329\" data-end=\"2347\"\u003eCompatibility:\u003c\/strong\u003e Fits standard 2-inch eyepieces, diagonals, filter wheels, and imaging accessories\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2432\" data-end=\"2453\"\u003e\n\u003cp data-start=\"2434\" data-end=\"2453\"\u003e\u003cstrong data-start=\"2434\" data-end=\"2442\"\u003eSKU:\u003c\/strong\u003e \u003cstrong data-start=\"2443\" data-end=\"2453\"\u003e310110\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2455\" data-end=\"2739\"\u003e\u003cstrong data-start=\"2455\" data-end=\"2473\"\u003eWhy It Matters\u003c\/strong\u003e\u003cbr data-start=\"2473\" data-end=\"2476\"\u003eAn S II filter is an essential component of serious narrowband astrophotography. The Explore Scientific S II 12 nm 2-inch filter enables cleaner sulfur signal capture and improved contrast, helping reveal subtle nebular structures even under light-polluted skies.\u003c\/p\u003e\n\u003cdiv class=\"product-info__description\"\u003e\n\u003cdiv class=\"prose\"\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44476531671074,"sku":"310110","price":209.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/6968\/5282\/files\/310110_2.jpg?v=1761947787","url":"https:\/\/telescopewolves.com\/products\/explore-scientific-s-ii-12-nm-narrowband-filter-2-inch-310110","provider":"Telescope Wolves","version":"1.0","type":"link"}