ALFUHCLSQ65

FUHCL-SQ65

Alpine Astronomical

Designed to filter out light pollution, including LED light, the Alpine Astronomical Baader UHC-L Ultra-L-Booster Nebula Filter produces bright, high-contrast, accurate-color images and views of nebulae and comet tails. Its two passbands admit H-alpha, H-beta, and O-III lines while rejecting stray light from LED lamps, traditional streetlights, headlights, and natural sky glow. The filter features Reflex-Blocker coatings and Life-Coat sealed edges for halo-free, CMOS-optimized performance, and is bright enough to use with slow or small-aperture telescopes as well as large, fast instruments.None Ultra high contrast L filter blocks city lights and increases contrast of nebula and comets (C2 lines) Can be used as LED-optimized luminance filter for RGB-imaging with skyglow suppression Blue transmission optimized to block blueish skyglow caused by LED headlights and streetlights Creates a much brighter image than a conventional nebula filter Ideal for deep-sky observers and the perfect visual complement to narrowband O-III filters Reflex-Blocker hard coated and planeoptically polished with sealed coating edges (Life-Coat) Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim