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Old 09-10-2007, 12:04 PM
ausastronomer (John Bambury)
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Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
Posts: 2,620
Quote:
Originally Posted by rumples riot View Post
Sorry to offend, but I have been around for a long time and heard lots of people say things that can't be done or you are using the wrong scope for that.

Paul
Hmm,

That's obvious on the basis you bought a beautiful timber truss dob with a 2" thick mirror for planetary imaging and then had to hack holes in the box because of cooling issues.

Personally, I would have ordered the scope with a 1.6" thick mirror from Mark or Carl Zambuto (both are offered as mirror suppliers), if I wanted the scope for planetary imaging. This would have resolved most of your cooling problems. I can tell you from experience that my 2" thick 18"/F4.5 OMI mirror, while superb, takes forever to cool with 4 fans on it.

You may have been around a long time, but you didn't learn much about mirror cooling and large aperture telescopes

Cheers
John B
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