Quote:
Originally Posted by JohnH
Mike, wow that is short - the advice I have had is use the longest exposure you can to avaoid chasing the seeing (ie correcting for errors that are not real). The max exposure will depend on the quality of the mount (ie the max PE and how smooth it is). Normal range seems to be 2-5 secs but this will also depend on the arcsec per pixel of your imaging train. I guess Mike that your tolerance for errros is tiny due to the extreme fl and small chip sizes you are used to when doing planetary work?
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I usually go for 2 sec, but have on occasion gone to 10 sec if the guide star is faint. Seems to work OK.