Optical Vision Light Pollution Filter For Telescope 2 inch 20199

Name: Optical Vision Light Pollution Filter For Telescope 2 inch 20199
Brand: Optical Vision

Optical Vision

--About Us\n--Items for Sale\n--View Feedback\n\n--Home\n--About\n--Latest\n\n--\n\n--\n\n--\n\n--\n\nOptical Vision Light Pollution Filter For Telescope 2 inch 20199\n\nTrusted Seller\nView Our Feedback\n\nOne of eBay's most reputable sellers\nConsistently delivers outstanding customer service\n\nAsk a Question\n\nDescription\n\nDescription\n\n2 Inch Light Pollution Filter is a contrast-enhancing anodised aluminium, optical glass filter designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution, whilst providing higher transmission at critical hydrogen-alpha and hydrogen-beta lines than competing filters. Bright, light-polluted skies appear much darker, and the contrast between object and sky is improved significantly. This contrast-enhancement effect is particularly apparent on nebulae. Unlike stars, emission nebulae give off light in a very narrow range of wavelengths.\n\nView More Items\n\nBrowse Range\nCameras & n