Quote:
Originally Posted by Slawomir
As far as I know, f/30 is not optimal for galaxy imaging.
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Can't have it all, eh...
The question Glen asks has been much discussed. Cass vs Newt, slow vs fast, small obstruction vs large, and a secialized application. The final selection is a confounded one. Why not a big SCT with focal reducer? Good compromise I would have thought. Aperture along with a couple of focal ratio options, slow and fast-ish, in the one scope. Yes there is the corrector plate, but not difficult to protect from dew, especially if it's in an obs.