This is the November 2012 meeting of the Texas Astronomical Society ATM special interest group. Ken Clayton demonstrates making a tool which is used to grind a mirror (very detailed demonstration).

Dale Sander shows an instrument which is used to calculate the focal length of a mirror.

texasastro.org

telescopeman.org
telescopeman.us
telescopeman.info

Loading more stuff…

Hmm…it looks like things are taking a while to load. Try again?

Loading videos…