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When I align my mount I take a four and a half minute subs like this: for the fist 30 sec I leave the mount doing normal tracking, and switch the mount to 2x RA for 2 min, and then the last 2 minutes is with no tracking. The resulting image shows the start position of the star and a trail heading to one side of the image and back again in a V shape, I adjust the mount accordingly until I get a single line.
Not sure if something like this could be done with the Polarie?
cheers
Jo
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