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The CLS-CCD broadband filter is designed to improve the visibility of various deepsky objects-Optolong Optics Co.,Ltd.
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Astronomik CLS CCD Canon EOS Clip Filter - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights
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SkyTech vs Astronomik CLS-CCD filters for city imaging - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights
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