Quote:
Originally Posted by Satchmo
Star Instruments quote 1/20 RMS 1/4 wavefront on their website. This is ample quality for an instrument with large central obstruction that is designed for deep sky imaging at prime focus not high magnification planetary work.
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I agree here, and this is why i believe the prices are much lower than other manufacturers, of course not taking into account the lower prices you already get from China.
All you require is PV 1/4 wavefront error, as was said, so less time is spent getting the surface to a higher degree, which you will not see in real life anyway due to atmosheperic seeing.
Theo.