I did an imaging session on the Crescent nebula the other night and, on looking at the images with FITS liberator, I notice that the bias offset was set to 83. I was using APT to do the captures and had not set any bias offsets anywhere. I was also using the native camera driver. Is this the default offset or have I changed something somewhere else to end up with it so high? N.B. I was also at unity gain (139).
ZWO ASI1600MM Pro Bias Offset question
Well written Engaging
I had very similsr thing, the SIPS program’update changed both the gain and offset to 0. I re-installed Ascom driver and the ASI native driver but nothing helped. I need manually change setting everytime now. Something is wrond with the updated drivers but ZWO does not accept it….
Bias frame gradient
I have a new ASI294MM Pro (monochrome). I took 100 bias frames at gain 120, offset 20, -10C, and 1x1 binning. The statistics are consistent across the raw frames I examined. However, I extracted the gradient across several of the unstacked frames usi...
Discusses bias frames and offset settings with similar camera model.