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Advice choosing IDAS LPS D2 or P2 filter. - Getting Started Equipment Help and Advice - Stargazers Lounge
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IDAS Light Pollution Suppression Filters - D1. 28.6mm LPS D1 filter [HU-LPS-D1-286] - D1 Series - O'Telescope
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I think I like my new IDAS LPS-D2 filter - Electronically Assisted Astronomy (No Post-Processing) - Cloudy Nights
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Astrophotography Light Pollution Filter Shootout! IDAS LPS D1 vs IDAS LPS D2 vs OPTOLONG L-PRO - YouTube
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