[Bmanners]

Greetings All,

I have been reading these forums with great interest, alot of good info in here. I'm curious however about the cooled mirrors I have read about. How does the mirror temperature affect the image of the telescope? Does an uneven temperature distribution cause the shape of the mirror to change? or is there some other reason. Is it a large affect or only a real issue with the photography (which I have to say is way cool!). Is colder better or close to ambient better?

I work with Peliters and heat flows so I find this stuff interesting.

Cheers
Brett