Quote:
Originally Posted by Shiraz
no idea Allan. Maybe that RC design had very tight tolerances on one or other mirror profile - or maybe it was seen to be a good marketing point? For a Newtonian imager though, 1/4 wave is way better than the seeing will allow.
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I don't know really.
I would tend to go for the best optics I could afford.
Some of those RCOS ion milled 14.5" telescopes made such good pics:
http://gallery.rcopticalsystems.com/gallery/m83.html
http://gallery.rcopticalsystems.com/gallery/ngc253.html