{"product_id":"touptek-1-25-inch-astronomical-sho-narrowband-filters-ha-sii-oiii-6-5nm-fwhm-filters-for-deep-sky-photography","title":"ToupTek 1.25-Inch Astronomical SHO Narrowband Filters Ha+SII+OIII 6.5nm FWHM Filters for Deep Sky Photography","description":"\u003cp\u003e\u003cb\u003eIntroduction:\u003c\/b\u003e\u003cbr\u003e- Narrowband filters for astrophotography isolate specific emission wavelengths while suppressing unwanted background light, helping improve contrast and signal-to-noise ratio when imaging emission nebulae.\u003cbr\u003e- ToupTek Astro SHO narrowband filters are precisely tuned to the three main ionized emission lines found in star-forming regions:\u003cbr\u003e  Hα (656.3nm)\u003cbr\u003e  SII (671.6nm)\u003cbr\u003e  OIII (500.7nm)\u003cbr\u003e- By using these filters, you can effectively block urban light pollution and background stray light, dramatically enhance signal contrast, and bring out incredible detail -- empowering you to achieve Hubble-like color mixing (SHO synthesis) in your astrophotography.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cbr\u003e- Size: 1.25”\u003cbr\u003e- Glass thickness: 2mm\u003cbr\u003e- Transmission range:\u003cbr\u003e  H-alpha filter: central wavelength 656.3nm\u003cbr\u003e  SII filter: central wavelength 671.6nm\u003cbr\u003e  OIII filter: central wavelength 500.7nm\u003cbr\u003e- Transmittance: \u0026gt;90%\u003cbr\u003e- FWHM: H-alpha (6.5nm) \/ SII (6.5nm) \/ OIII (6.5nm)\u003cbr\u003e- Glass material: Quartz glass\u003cbr\u003e- Frame material: Aluminum Alloy\u003cbr\u003e- Surface treatment: double-sided high-precision optical polishing\u003cbr\u003e- Coating technology: IAD (Ion Assisted Deposition)\u003cbr\u003e- Coating system design: AR anti-reflection coating + quartz glass + precision cutoff coating layer\u003cbr\u003e- OD: ≥5.0\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Set of SHO Filter\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-01.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-02.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-03.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-04.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-05.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-06.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-07.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/105030\/105030-08.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"ToupTek","offers":[{"title":"Default Title","offer_id":48364670222572,"sku":"105030","price":92.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9669\/3740\/files\/20260915094752_e64111fd.jpg?v=1789544377","url":"https:\/\/teseek.com\/ja\/products\/touptek-1-25-inch-astronomical-sho-narrowband-filters-ha-sii-oiii-6-5nm-fwhm-filters-for-deep-sky-photography","provider":"TeSeek Official","version":"1.0","type":"link"}