{"product_id":"zwo-narrowband-7nm-oiii-sii-ha-filter-set-1-25","title":"ZWO Narrowband 7nm OIII,SII \u0026 Ha Filter Set - 1.25\" - NB7NM1.25","description":"\u003cp\u003eThis Narrowband Filter Set from ZWO, also known as a SHO Set, is used for tri-color astrophotography to give you beautiful \"Hubble\" type results.  The three-piece filter set includes a 7 nm OIII, SII \u0026amp; Ha 1.25\" threaded filter.  The glass thickness is 2.0+\/-0.03 mm, and the overall thickness of the filter is 5.5 mm plus 2.5 mm for the M28.5 x 0.6 male threads.  The ZWO 7 nm bandpass is designed for imaging nebulae.\u003c\/p\u003e\n\u003ch3\u003eH-Alpha (Ha) Filter\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO H-Alpha filter has a bandpass of 7nm.  This Ha filter passes light at 656nm wavelength at a transmission rate of 90%. A narrowband H-alpha filter yields high-contrast images of nebulae, even when you're imaging in light-polluted skies, especially those plagued by mercury vapor \u0026amp; sodium vapor lights as well as skyglow caused by neutral oxygen emissions in the atmosphere.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSulphur (SII) Filter\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eThe ZWO SII Filter has a bandpass of 7 nm and passes light at 672nm wavelength at a transmission rate of 90%.  The SII filter is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, or use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eOxygen III (OIII) Filter\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eThe ZWO OIII Filter is designed for nebula observation, allowing a 7nm bandwidth of light centered on the OIII 500nm line with about 90% transmission.  Adding the ZWO OIII Narrowband Filter to your collection will help you go beyond RGB imaging and will help capture your favorite nebulae in a totally new light, no matter how polluted your skies may be!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Details of ZWO Narrowband Filters\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM：7±0.5nm\u003c\/li\u003e\n\u003cli\u003eGlass Thickness 2.0+\/-0.03 mm  (1.25”\/31mm\/36mm)\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront over the both surfaces\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at H-alpha line 656nm (H-Alpha filter )\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at SII line 672nm (SII filter )\u003c\/li\u003e\n\u003cli\u003eAbout 90% transmission at major OIII line 500nm (OIII filter )\u003c\/li\u003e\n\u003cli\u003eInfrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.1% transmission of off-band, OD3(Optical Density)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":40193372749937,"sku":"ZWO-NB7NM1.25","price":333.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/NB7_125_SET.jpg?v=1776459202","url":"https:\/\/khanscope.com\/en-fr\/products\/zwo-narrowband-7nm-oiii-sii-ha-filter-set-1-25","provider":"Khan Scope Centre","version":"1.0","type":"link"}