{"product_id":"touptek-oiii-2-inch-4nm-fwhm-narrowband-filter-astronomical-filter-for-deepsky-photography","title":"ToupTek OIII 2-inch 4NM FWHM Narrowband Filter Astronomical Filter for Deepsky Photography","description":"\u003cp\u003e\u003cb\u003eToupTek OIII 2-inch 4NM FWHM Narrowband Filter Astronomical Filter for Deepsky Photography\u003cbr\u003e\u003cbr\u003eDescription:\u003c\/b\u003e\u003cbr\u003e- Ultra-narrow precision isolation for superior signal-to-noise ratio and exceptional Hubble Palette nebula details.\u003cbr\u003e- Narrowband filters are essential for astrophotography. Astronomy SHO filter targets the three key ionized emission lines in stellar nurseries: SII (671.6nm); Hα (656.3nm); OIII (500.7nm)\u003cbr\u003e- With a narrower 4nm FWHM bandpass, it precisely transmits the target light while providing stronger suppression of urban light pollution and background gradients. This also reduces band overlap, resulting in higher signal-to-noise ratio, improved contrast, and more distinct detail. It is well-suited for creating images in the Hubble Palette.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTechnical Parameters:\u003c\/b\u003e\u003cbr\u003e- Size: 2-inch\u003cbr\u003e- Glass thickness: 2mm\u003cbr\u003e- Transmittance: \u0026gt;90%\u003cbr\u003e- FWHM: 4nm (all channels)\u003cbr\u003e- Glass material: Quartz Glass\u003cbr\u003e- Frame material: aluminum alloy\u003cbr\u003e- OD value: ≥5.0\u003cbr\u003e- Coating technology: IAD (Ion Assisted Deposition)\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x OIII Filter\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-01.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-02.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-03.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-04.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-05.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-06.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-07.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 960px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101425\/101425-08.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"TeSeek Official","offers":[{"title":"Default Title","offer_id":47522380284140,"sku":"101426","price":204.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9669\/3740\/files\/1775610775-1.jpg?v=1776059593","url":"https:\/\/teseek.com\/fr\/products\/touptek-oiii-2-inch-4nm-fwhm-narrowband-filter-astronomical-filter-for-deepsky-photography","provider":"TeSeek Official","version":"1.0","type":"link"}