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Mark Harry
Post Laureate
Reged: 09/05/05
Posts: 3126
Loc: Northeast
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Re: flat mirror tests
07/01/09 06:42 AM
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Use it in a Newt, with a known good primary. If it shows the typical 'stig pattern when viewing a star in and out of focus, it's no good. Suiter's book shows what certain amounts look like, so you might be able to quantify the error.
Mark
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So many projects, so little time!
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