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ASSF – Baader Solar Filter for spotting scopes, amateur telescopes and camera-lenses - AstroSolar.com
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AstroZap Baader Solar Filter | Solar Telescope Filter
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Amazon.com : Solar Filter 2.50'' (ST250G) Glass Solar Filter Fits: View Finders, Cameras, Small Refractors, Spotting Scopes, and Binoculars; Celestron 9X50 Finder; Williams Optics 7 X 50 Finders : Electronics