|
Flats calibrated with a good master bias is what I have found to work best with my ASI2600MC, and with the MM. Which is very handy as it means you do not need to shoot fixed length flats.
Lights I calibrate with the good master flat produced by that method, and either the master bias, or a master dark of the right gain, offset, exposure time and temp. On very long exposures I have found that without a good master dark (Which contains the bias info in my case) the master flat tends to overcorrect the corners as it amplifies what little dark current there is and brightens the corners.
|