Quote:
Originally Posted by Saturnine
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.
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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.