Optolong UHC Light Pollution Filter Canon EOS FF Full Frame Camera altazimuth collimation rings are provided

collimation rings are provided

Erect image star diagonal

the multi-coated lenses and BaK-4 prisms maximize light transmission for remarkably bright

EdgeHD technology gives you pinpoint stars all the way to the edge of the CCD sensor

These contrast-enhancing anodized aluminium

Optolong UHC Light Pollution Filter Canon EOS FF Full Frame Camera altazimuth collimation rings are providedOptolong UHC Light Pollution Filter Canon EOS FF Full Frame Camera The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in