Dr. Erhard Hänssgen's 42 inch (107 cm) Dobsonian Telescope
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Utah truckdriver builds worlds largest amateur telescope | Daily Mail Online
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Dr. Erhard Hänssgen's 42 inch (107 cm) Dobsonian Telescope
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Orion 50" Monster Dobsonian Telescope | Orion Telescopes
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Amazon.com : Celestron Sky-Watcher Flextube 250 Dobsonian 10-inch Collapsible Large Aperture Telescope – Portable, Easy to Use, Perfect for Beginners, White/Black (S11720) : Reflecting Telescopes : Electronics
