They show great structural details, but have natural colors, looking like an RGB image. Many images of planetary nebulae and supernova remnants are taken only with H-alpha and OIII filters. This is a blue-green colored filter as OIII emits 495.9nm and 500.7nm. While Optolong is a relative newcomer to the astronomy industry, they are no strangers to optics and filters. Allowing 25nm bandwidth of light centered on a wavelength of 500nm to pass through, which corresponds to OIII emission lines.Selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting (including mercury vapor lamps, both high & low pressure sodium vapor lights, and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.Compare image was shot by Vincent Cheng with. Greetings And thank you for visiting Agena AstroProducts. 226 views, 2 likes, 0 loves, 0 comments, 2 shares, Facebook Watch Videos from Optolong Filter USA: L-Pro and L-eNhance latest video, click and watch it. The Optolong O-III (Oxygen-III) filter is designed to improve the visibility of various deep sky objects. Affordable, Quality Telescopes, Binoculars and Accessories for the Astronomy Enthusiast. Color Correction & Minus Violet Filters.Founded in 1999, Optolong has become an integrated enterprise not only specialized in R&D, but also good at manufacturing. Correctors, Focal Reducers & Flatteners is the brand owner of optolong who is the joint of industry and trade.
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