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Baader Planetarium Protective Wide T-Ring for Canon-EOS, incl. fineoptically polished 7nm H-Alpha Filter 50.4mm dia - KW Telescope
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Comparison Antlia 3nm Ha filter to Baader 7nm Ha filter - Experienced Deep Sky Imaging - Cloudy Nights
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Comparison Antlia 3nm Ha filter to Baader 7nm Ha filter - Experienced Deep Sky Imaging - Cloudy Nights
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