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Old 15-10-2021, 10:50 PM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

cometcatcher is offline
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,517
Originally Posted by Saturnine View Post
Maybe you got lucky with a good sample or, maybe the overall quality of the mirrors is more than good enough, better than the diffraction limit. Would be an interesting exercise to put a sample of mirrors on a test stand and do a knife edge test .
Suppose there is enough proof provided by the quality of your images though.
I do have a mirror tester... somewhere. It's been nearly 30 years since I used it. I'll have to see if I can find it and test the mirror next time it's out for a clean.
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