[gregbradley]

I have a camera which has a couple of minor columns that form a dark line vertically. These are quite common with CCD cameras.

I use CCDstack for calibration. Mostly these just dark subtract out but I am finding sometimes they persist.

Has anyone got some advice about best practice to remove these? CCDstack has a bad pixel map function which I used briefly yesterday and it did not seem very user friendly or effective.

Greg.