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Anyone tried adaptive optics at f4 or thereabouts?
Has anyone used a refractive AO at f4? I did some calcs to see how much SA is introduced by a flat plate at f4 and it seems to be about 1/4 wave, which will be well within the seeing blur. Not sure of CA though - a back of envelope shows longitudinal CA of 77microns assuming BK7, which is a bit too much for hi res broadband imaging with my f4, but would be fine for narrow band or even RGB. Grateful to hear from anyone who has tried refractive AO with a fast scope - or if anyone has the ability to ray trace such a setup.
very grateful for any advice - I don't want to buy one and then find out that it produces lovely round stars, but degrades resolution. Cheers Ray
Last edited by Shiraz; 10-11-2013 at 11:20 PM.
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