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Advice choosing IDAS LPS D2 or P2 filter. - Getting Started Equipment Help and Advice - Stargazers Lounge
Re: what should I know before using a Light Pollution filter?: Astrophotography Talk Forum Forum: Digital Photography Review
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Understanding IDAS D1, P2, V4 & HEUIBII Filters - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights
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