Quote:
Originally Posted by bojan
These tests, performed by others are not cheap, to do them may cost you more than new mirror (from GSO)
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Bojan
I don't know how cheap GSO mirrors have gotten these days, but I've always charged $100 for a full test including quantitative measure of spherical aberration and any features that may depart from Diffraction Limited quality. Funnily enough ,while most people would like to know how good their mirrors are few have ever paid to have their mirrors measured.