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Old 28-10-2016, 08:18 PM
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Crushellon (Tim)
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Join Date: Aug 2015
Location: Brisbane, Australia
Posts: 162
Flat frames over correcting.

Hi guys.

I'm having a problem with my flat frames over correcting my light frames, ie lighter corners and dust motes being brighter instead of darker. I'm using bias and dark frames all done with the batch preprocessing tool in pixinsight. The flats are around the mid range of adu count with 6 seconds exposure at twilight. I've done a bit of reading of posts with this same issue and have seen in some cases adding to the adu count with pixel math can fix the issue but I don't know exactly how to do this. Any ideas?
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