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A 4-Inch (102mm) Refractor Can Be An Excellent Deep-Sky Telescope: Finally Sirius B, Barnard's Galaxy, and Much More….
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A 4-Inch (102mm) Refractor Can Be An Excellent Deep-Sky Telescope: Finally Sirius B, Barnard's Galaxy, and Much More….
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Istar 6 inch F/12 Equatorially Mounted Achromatic Refractor - Members Equipment Gallery - Stargazers Lounge
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Amazon.com : Celestron Advanced VX 6-Inch Refractor GoTo Telescope : Refracting Telescopes : Electronics
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