{"product_id":"zwo-1-25-sii-7nm-narrowband-filter-sii7nm125","title":"ZWO 1.25\" SII 7nm Narrowband Filter - SII7nm125","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO SII 7nm Narrowband Filter passes light at the 672nm wavelength with a bandpass of 7nm for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants.  Use this SII (Sulfur II) with H-alpha and Oxygen III narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis rendition of the ZWO SII 7nm Filter is housed in a 1.25\" threaded metal cell and can be used in 1.25\" filter wheels or the ZWO 2\" filter drawer with a 2\" to 1.25\" filter adapter installed.  \u003c\/p\u003e\n\u003ch3\u003eHow to Use the ZWO SII 7nm 1.25\" Filter...\u003c\/h3\u003e\n\u003cul class=\"wp-block-list\"\u003e\n\u003cli\u003eA Hubble look can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eNarrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon in the sky so your equipment is not sitting dormant until the next new moon.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSize: 1.25″\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThickness: 5.5mm + 2.5mm(thread)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eGlass thickness: 1.85mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThread: M28.5*0.6 male thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM：7±0.5nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront  over the both surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAbout 90% transmission at SII line 672nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eInfrared wavelength 700-1100nm cut-off\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u0026lt;0.1% transmission of off-band, OD3 (Optical Density)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":41368423465073,"sku":"ZWO-SII7NM125","price":116.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/SII7nm_125_Filter.webp?v=1776459308","url":"https:\/\/khanscope.com\/fr-fr\/products\/zwo-1-25-sii-7nm-narrowband-filter-sii7nm125","provider":"Khan Scope Centre","version":"1.0","type":"link"}