Oh right, that looks like an on camera dark frame subtraction to cancel read noise. I'm surprised they bothered on a IMX533 camera as the read noise is very low anyway. Personally I wouldn't bother with the LRN mode for planetary or DSO (where I'd be using darks during the stacking/calibration process anyway).
Read More...
© 2003-2022 by INDI Library. All rights reserved.