I have seemed to notice this bug when I take multiple consecutive frames with this camera, the first frame always is fine, but the second frame will be like this ( see attached screen shot of FITS image) you can see the image data is clipped, the FITS header appears fine. I have found I can resolve this if I either disconnect/re-connect to the camera or if I stay connected but take a short exposure (0.01s seems to work fine) that short exposure seems to resolve it then I can take another exposure that is my normal length and its fine again. Disconnecting each time would be a OK work around except then I have to re-cool the camera each time which wastes a lot of time waiting for it to settle again. Any ideas on what is going on? I also have a ATIK camera and have never seen this behavior using the same python code.