|
Could be a number of things:
1) The obvious first: are the darks and biases taken with the same ISO, duration, and (broadly) temperature as the lights?
2) you don't mention flats: is that because there aren't any, or they processed fine? If the latter, then I would think you mt have light leaking in when you took your darks and biases. I had this when light was getting in the viewfinder, with similar results. The darks *looked* ok until I stretched them.
3) uncheck the "set black point to zero" box in the settings menu. I have no idea why this might work, but it did for me when I had a similar issue.
|