Quote:
Originally Posted by multiweb
Good for you Frank. You'll have fun with your new toy.
What's important is your image scale:
206.265/600mm * 4.4um ~ 1.5 [ED80] [Atik]
206.265/600mm * 6.4um ~ 2.2 [ED80] [Canon]
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Now a QHY8 on the back of a C8 gives:
206.265/2032*7.8 ~= 0.8
Quote:
Originally Posted by multiweb
Just plug your RC FL in mm in the formula below and it will give you your image scale. Anything around 1-1.5asp is good. 2-3 good for widefields. Under 1 to 0.5 need AO or very good seeing.
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So I guess that explains the fuzzies, even when the Bahtinov mask says focus is excellent. Would I have more luck with the 0.63 or 0.33 focal reducer installed:
206.265/(2032*0.63)*7.8 ~= 1.3
206.265/(2032*0.33)*7.8 ~= 2.4