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Posted by Gintautas on June 26, 2004 17:43:04 UTC

" I've done several 12.5" mirrors that thick and the results haven't shown any astigmatism on the test stand from the glass potato chipping"

This worries me... If an expert didn't encounter problems, doesn't mean I won't. :)

I have two alternatives. ~11" F/6.5 or 12" F/6. My current largest scope is 8". No, not made by myself. Bigger scope would give me 35% more light increase and I do love deepsky observing.

Any advice is appreciated.

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