How to change the secondary mirror on your telescope! (To one of the best mirrors out there)
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How To Centre Spot A Telescope Mirror
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Star Test to Fix Your Telescope
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Modificações do telescópio DOBSONIAN de 8 polegadas | 2ª Onda |
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How to clean a telescope mirror - I am testing a new method!
46:20
12.5" Dobsonian Telescope Build
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12 inch f4.9 Telescope Mirror Part 4
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Newtonian Telescope Collimation for Absolute Beginners
14:31