Explore Scientific 20" f/3.6 Truss Tube Gen 2 DOB2036-00 B&H
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Used 20-inch f/5 Obsession Dobsonian Telescope
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20 inch Dobsonian Telescope construction - YouTube
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A homemade 20 inch dob lightweight telescope, DS-5
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Jupiter - with nice GRS details - 16 inch dob - Sky & Telescope - Sky & Telescope
UL20
Used 20-inch f/5 Obsession Dobsonian Telescope
Dobsonian Telescopes | The Absolute Best Bang for Your Buck
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Obsession Telescopes / Telescopes / 20" Classic
