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Use Ascom pulse guiding ( guide camera cabled direct to laptop ) not the old ST4 way where camera is connected to mount first then mount to laptop
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Yea I've seen many online say Pulse is the way to go, my ZWO 120mm is connected via USB-C and pulse guiding (So far I've only pushed upto 5min subs when it's all working
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Also once you get a good calibration you can save it for months and months ( provided you don’t move the guide camera and guide scope on the OTA ) I’ve used the same calibration for over a year with no issues.
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Ahh fair enough! I've got in the habit of redoing it every time, because my location has the poles blocked visibly, so I drift align every time via the PHD2 tool (I try to get it around 3 arc secs or under every time) and then sometimes during my imaging sessions it drops off tracking the DEC, re-calibrating keeps it happy and running.