Astromania 1.25 Narrowband H-Alpha Night Sky Filter,Night Sky Filter Astromania 1.25 Narrowband H-Alpha,25" Narrowband H-Alpha Night Sky Filter : Camera & Photo,: Astromania 1, Fast, Free Shipping and Returns Free all field Freight delivery Online promotion Boutique department store online purchase! Narrowband H-Alpha Night Sky Filter Astromania 1.25.
: Astromania 1.25' Narrowband H-Alpha Night Sky Filter : Camera & Photo. : Astromania 1.25" Narrowband H-Alpha Night Sky Filter : Camera & Photo. A filter with incredible light pollution cut off characteristics. 。 The new H-Alpha passfilter enables high-contrast deep sky images of H-II regions. 。 The H-Alpha filter shares the same outstanding features as all the other Astromania imaging filters. 。 Unmatched optical quality, and high efficiency hardened multicoatings result in the sharpest and highest contrast images possible. 。 The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared. 。 The Night Sky Hydrogen-Alpha Filters are narrowband filters with a 0% transition from blocking to passing at about 60nm. At wavelengths longer than 60nm, transmittance is 0% or above. This convenient filter only allows wavelengths above 60nm through, which means it blocks a large part of the scattered light and also blocks the light from artificial mercury and sodium-vapour lamps. The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared. The ." Night Sky Hydrogen-Alpha Filter, threads into the nose-piece of industry-standard ." Digital Imagers. The H-Alpha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies. 。 。 。
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