|
My EL sheet generates a blue/white light. I shoot 8s flats with the QHY8 (20 of them) and aim for approx. 18000 ADU on the red pixels. I then combine them in a master (median/sigma reject) in CCD Stack and subtract a matching master dark (8s). Seems to work for now. Still testing.
I tried to debayer first then treat each channel separately during calibration. There was no significant improvement and it was more work. So calibration should be done with bayer matrix still in the FITS. Good Flat fielding proved to be the most complicated thing I came across in astro photo so far. I really struggled to get it right and still am.
|