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Peter, I found the other day that if I did a 5 min exposure using a 2 second refresh, I got star trails (small, but noticeable). If I dropped the refresh to 0.2s, a 5 min sub showed no star trails. So, I just suggested this based on the experience at the time. I found the mount hunted no more than usual, and definitely no aggressive corrections as it seems to sometimes do at 2 sec exposure.
So, not sure where to go with that then. You are probably correct.
Last edited by LewisM; 17-10-2012 at 08:46 AM.
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