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suggest that you choose a couple of standard gains (eg ~75 for broadband and ~200 for narrowband) and then fix them and the offset and temp forever. Use the standard settings for all imaging and calibration - changing anything needs new dark cal data (and bias if you use it).
agree that bias is not much use - it makes sense when scaling darks, but that is not very straightforward with this camera and is not worth doing unless absolutely necessary.
I find that it is best to calibrate with a set of darks that still have bias included (ie not calibrated) and a set of flats that have had flat darks subtracted (if the flat subs are short enough you can use bias in place of the flat darks). Then when calibrating lights, I only use the uncalibrated darks and the calibrated flats - bias is not selected. Also, works properly only if I turn off dark optimisation in PI.
If your flats have been dark calibrated they may still be ok, but you will need to redo darks if you change offset.
cheers Ray
Last edited by Shiraz; 08-03-2020 at 12:05 PM.
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