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.
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