{"product_id":"zwo-2-h-alpha-7nm-narrowband-filter-ha7nmd2","title":"ZWO 2\" H-Alpha 7nm Narrowband Filter - Ha7nmD2","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe ZWO H-Alpha filter has a bandpass of 7nm and passes light at the 656nm wavelength, with a light transmission rate of up to 80%. This is the best choice for a narrowband H-alpha astrophotography filter if you are doing high-contrast imaging and want to reveal rich details of the nebula even in areas with strong light pollution.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis rendition of the ZWO Ha 7nm Filter is housed in a 2\" threaded metal cell and can be used in 2\" filter wheels or the ZWO 2\" filter drawer.  \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eDo not use this filter for viewing or photographing that Sun; eye and\/or equipment damage could occur.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eHow to Use the ZWO Hydrogen-Alpha (Ha) 7nm 2\" 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\u003cul\u003e\n\u003cli\u003eAn H-alpha filter is the first narrowband addition to an LRGB set for most imagers who want to blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSize: 2″\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: M48*0.75 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\u003eAbout 90% transmission at H-alpha line 656nm\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":41368483758193,"sku":"ZWO-HA7NMD2","price":223.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/HA-7nm_2inch_Filter_eab6af6b-4734-4c81-996c-58fb0cfb4604.webp?v=1776459307","url":"https:\/\/khanscope.com\/en-fr\/products\/zwo-2-h-alpha-7nm-narrowband-filter-ha7nmd2","provider":"Khan Scope Centre","version":"1.0","type":"link"}