Quote:
Originally Posted by Moon
John
For visual you are 100% correct, but I thought we were talking about imaging here.
James
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James,
I asked you in an earlier post "what is the difference between the two". I don't see any, other than a need to compensate for flexure or slop in the focuser, due to the weight of the camera and that IMO is not a collimation issue, it's putting a bandaid on a focuser issue.
IMO a defocused star at 200X is a lot more telling on miscollimation and any other optical issues (to someone who knows what they are looking for) than what you see on your CCD chip.
Cheers,
John B