Spin Casting A Slumping Mold For Fast Telescope Mirrors - 2nd Attempt
4:11
DIY Vacuum chamber for telescope coating mirror03
1:10:16
Casting a light weight telescope mirror (all steps in the process)
17:04
How does a "first surface" mirror work? (2^15 sub special!)
21:06
Casting a lightweight hexagon back glass telesope mirror
16:32
Spin Casting A Slumping Mold For Fast Telescope Mirrors
43:38
Telescope Optics Testing
11:24
Preparing to Grind a 22" f/4.0 Telescope Mirror
24:29