Could there be some other defects on camera face making the problem worse?
I can also see a few grey dots in a line which could be condensation on the camera glass. The fact that calibrated subs look the same indicates some problem on the camera face and/ or with hot pixels. Have you tried taking just a couple of new darks and giving them a whirl while making sure remaining hot pixels are checked for removal? I have had bad darks before.
Quote:
Originally Posted by pmrid
I just did a stack of the raw uncalibrated images and got the same result. So it is not a problem with the calibration frames. The artifact is in the original subs. And you see in the stacked image the corresponding shifts on the left and right edges. So there appears to me to be an extraordinary number of hot pixels plus there is some drift from frame to frame.
Might be time to consider retiring either my CCD or myself I fear. I think one or other of us has had its day.
|