I have noticed a strange issue when taking flats with my asi585mc
Generally when taking flats the output image is as expected i.e. a grey-scale image but on certain exposure times that seem to vary randomly the image is yellow or green. Looking at the histogram for these images the channel for that dominant colour is shift way over to the right.
This behaviour is not limited to the asiimg app but has been seen in the Stars/Ekos capture module.
