domenica, giugno 22, 2008

Star Test of a 400 mm telescope

Here is the star test of a 400 mm telescope. The movie has been capture using a Canon Powershot 60 hand held in front of the eyepiece, while turning the focuser with the other hand!! There is a little bit of miscollimation and the mirror is not perfectly cooled (there are signs of convective cells). The star is Vega.