Quote:
Originally Posted by glend
Do mirror upgrades have any benefit for imaging Newts? .
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At typical focal ratios, the focal plane is sufficiently under sampled by any ccd that you are likely to encounter that there is no noticeable improvement to be gained by a mirror more accurate than 1/3 wave.
GSO mirrors are typically much better than that so are as good as you need. The issues surrounding cheap tube assemblies are related to deficiencies in the mechanical design (not the optics)