Light leakage or something else
attached image is a stack of 11, 10 minute frames with auto levels only applied no other processing taken on a warm night 23/11
I ran a series of darks (lens cap on) (indoors with the air-con on) today from 90 seconds to 10 minutes and still the same issue, each frame showed a bright band at top
Last time I used the camera was in mid October without an issue
The camera is on the way back to Theo for a check
