Quote:
Originally Posted by alpal
Dear Peter,
I am sure Bert is aware that higher resolution is more easily
obtained with a longer focal length & a Newt. with a smaller obstruction.
cheers
Allan
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I would be happier with this statement if I believed that those were the causes of his resolution related issues. The newt that took my image is 750mm focal length which is not much more than the rh200. Obviously pixel size will play a larger role. Forgetting this for a minute I suspect that a fsq with the same camera would perform better for both field curvature and on axis resolution.