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The relatively short exposures takes the mount out of the equation.
What I was interested in here was the intrinsic sharpness of each type of scope. Is one design intrinsically sharper than the other.
So short exposures of a star cluster will work quite well for an optical comparison, I think.
I don't know about Bratislav, but I was not using any FR or FF or CC, just a pair of mirrors and a camera.
I also don't think that the camera will make much of a difference, as long as the image is well sampled.
Hmm... the Rosette with a 1600mm scope, you won't see much of it unless you have a really big CCD (I tried it once), I just took a pic of this with my ED80 and the ST10, still couldn't fit it all in!
Cheers
Stuart
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