Quote:
Originally Posted by strongmanmike
Assuming you have ruled out collimation and image plain tilt, I think gear backlash and guide corrections, that are too aggressive, are more likely to be the cause of eggy stars than slightly out PA..?
Mike
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Next time its an issue I'll check that. I am using 6 second exposures and tuned the aggressiveness, usually its low as you say these are accurate mounts and too aggressive corrections just chase the seeing.
I think I have the aggressiveness around .6 with 6 second guide exposures. I have used 9 if the guide stars are dim and it does not seem to make a lot of difference to the guide errors.
Greg.