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Solar eyepiece (Herschel wedge) with two dark glass filters by John Browning | Science Museum Group Collection
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Antlia Imaging Herschel-wedge with 35mm Prism and 1.25" CaK Calcium-K 3nm 393.3nm Imaging Solar Filter - ANT-3.0CaKWEDGE
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Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter - ANTLIA ASTRONOMY FILTER
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