I am having trouble with calibration of my mono Oiii data, in the form of my flats over-correcting. The issue does not arise when using my mono Ha filter.
All of my lights and calibration frames are perfectly time and temperature matched, but try as I might, I cannot fix this issue.
I have heard that there is a Pixelmath workaround in Pi, is there any way I can fix this in Siril?
Apparently, this appears to be a common issue with Oiii filters.