Quote:
Originally Posted by poider
So if the mount has a mechanical error and the guide scope corrects that error.... wouldn't that cause movement whilst the scope catches up with itself, and therefore blur the image?
Peter
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The guiding is occurring at scales of a fraction of a pixel in size so as long as the mechanical error is small (not a big jitter) it can be guided out without any noticeable blurring. On a good mount the guide errors are considerably lower than the seeing conditions so the sky covers up the guiding