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Re: [ATM] Help with star test interpretation - TUE,SA or something else?
Grab your Ronchi grating and test the completed scope with that. Straight
lines indicate a good mirror while curved lines on a star indicate that
you're either over or under corrected and wavy lines indicate that there is
a bit of zone problems going on with your scope.
>From what you've indicated, you don't have a good shape yet as the inner
part of the scope is more closer to the proper shape than the rest of the
surface.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net
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