How to Make a Reflector Telescope Part 1 (4 inch Newtonian Reflector)
10:29
How to make a Reflector Telescope Part 2
17:00
How to Make a Telescope - 8 Inch Newtonian Reflector (Part 1)
10:58
How To Centre Spot A Telescope Mirror
7:47
Leonardo da Vinci inventions tested
18:24
Recyclez les piles usagées ! Comment faire une machine à souder simple à partir d’une batterie 1,5V
9:17
20 inch Dobsonian Telescope construction
10:59
Grinding a 25-Inch F3 Telescope Mirror: Thinning and Flattening the Back
20:23