|
Hi Stephane
Sorry to hear of your problem, I had a somewhat similar result when my camera frosted up. The artefact then slowly disappeared when I set the temp to +1 Deg C.
If that is not the case, try taking Flats at different exposures just to test if a longer/shorted Flat exposure might resolve the issue.
I also wonder if there might be a light leak or a bad internal reflection?
Good luck.
Dennis
|