Obsession Telescopes / Telescopes / 20" Classic
Taurus T500 20″
Obsession Telescopes / Telescopes / 20" Classic
parbolic mirrors, cassegrain systems mirror, LIDAR mirrors, sherical mirrors 400-860 mm
Best 20" Dobsonian Telescope — New Moon Telescopes
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The Dobsonian Telescope
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Amazon.com : 160mm Telescope Spherical Mirror - 1300mm Focal Length : Electronics
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