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Old 22-11-2013, 05:05 PM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
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Hubble is a bad example - no atmosphere.

I agree with you - as I said, central obstruction is not a problem in bigger scopes.

as long as the optics is good enough to outperform the atmosphere, the result will be as good as you can get. As Mark's post showed, a Newtonian with a corrector can do as well as anything.

Last edited by Shiraz; 22-11-2013 at 05:34 PM.
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