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It looks like you have your equipment working well with nice tight stars
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I hadn't looked that close when I posted this. You do have 'Eggy' stars which are most probably caused by mount tracking error. If only a few subs you took has these odd shaped stars, then it could be wind or mount PE. A 2min exposure is a lot to ask from an unguided SkyGuider Pro mount at 250mm focal length. Wind or no wind your Polar alignment would have to be very accurate to achieve round stars over 2 mins. Try cutting the exposure back to 1 min and just do more of them