How to grind a mirror for a telescope
30:47
12 inch f4.9 Telescope Mirror Part 4
30:43
Making a monolithic telescope Part 3: Figuring & Testing
32:26
12 inch f4.9 Telescope Mirror Part 2
17:04
How does a "first surface" mirror work? (2^15 sub special!)
1:28:31
Telescope Building with John Dobson
12:27
Home made Vacuum chamber 2.0 for telescope coating mirror
13:49
Pitch Bowl for Chasing and Engraving, Huge Brass Casting
14:06