[Gavin1234]

Hi, just 2 quick questions.

I have lots of 5 min subs taken over different nights which I want to stack together. Because I’ve had to move my scope back inside at the end of each night I’ve had to do new calibration shots each night, flats, bias and darks (1st question; is that actually necessary?)

Also, can I calibrate each nights lights against the calibration frames and then align and integrate the calibrated lights? Or do I have to do a HDR composite?Hope that makes sense.