Telescope Building with John Dobson
1:15:09
John Dobson: A Sidewalk Astronomer FULL MOVIE
46:20
12.5" Dobsonian Telescope Build
1:08:10
🔥Sadece %1'i bu sırrı biliyor: İnanamayacağınız en iyi 10 dahiyane Kendin Yap fikri 😱
39:44
How to grind a mirror for a telescope
31:43
Telescope Restoration - John Dobson used THIS #Dobsonian
21:31
How to Make a Pitch lap and Polish a telescope mirror!
16:21
Restoration of Mysterious Knife - What's Your Opinion?
1:10:16