{"product_id":"sii-5nm-optical-filter-for-telescope-astrophotography","title":"SII 5nm Optical Filter for Telescope Astrophotography","description":"\u003cp\u003eEnhance your astrophotography setup with this SII 5nm optical filter, designed to bring out the fine details of sulfur-II emissions in nebulae and deep-space objects. It’s a key tool for producing rich, colour-balanced composite images.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eSII 5nm filter isolates sulfur-II emissions at 672nm for high-contrast imaging\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003e90% peak transmission maximises light capture for clear, detailed photos\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eNarrow bandwidth reduces background glow from light pollution\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eIdeal for deep-space photography when combined with H Alpha and OIII filters\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003ePrecision optical coating ensures consistent performance and durability\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eCompatible with 2 inch telescope eyepieces and imaging systems\u003c\/p\u003e\n\t\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eType: SII Narrowband filter\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eSize: 2 inch (50.8mm)\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eCentral Wavelength (CWL): 672nm\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eBandwidth (FWHM): 5nm\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003ePeak Transmission: ≥90%\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eBlocking: ≥OD5\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eThread: M48x0.75\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003eThickness: 1.85mm\u003c\/p\u003e\n\t\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\t\u003cp\u003e1 x SII 5nm Filter\u003c\/p\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\u003cp\u003e1 x Material Plastic Box\u003c\/p\u003e\n\t\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Makes This a Smart Buy:\u003c\/strong\u003e\u003cbr\u003e\nWhen used alone or alongside OIII and H Alpha filters, this SII filter delivers balanced, high-contrast deep-space images with professional clarity—perfect for advanced astrophotography projects.\u003c\/p\u003e\n","brand":"OEM","offers":[{"title":"Default Title","offer_id":51499130552619,"sku":"9362172058083","price":256.49,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/8617\/3227\/files\/3f0d5bc6-bdc0-4512-8724-f8b7d0803bad655792.png?v=1763033057","url":"https:\/\/stuffologystore.com.au\/products\/sii-5nm-optical-filter-for-telescope-astrophotography","provider":"Stuffology Store","version":"1.0","type":"link"}