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Yet another flat field problem
Hello,
I first would like to say that I really appreciate all the very informative videos you put out for image processing. They are all very well done and very helpful.
The ASi 1600 CMOS camera I had in the past was extremely easy to calibrate. It seemed I could through any kind of flat field image at it and the image would flatten out and look great. I've since switched to an ASI294 OSC and everything has been turned upside down in terms of calibration. Now, no matter how careful I am with taking good flats, darks, flat darks and bias frames, nothing works. The flats are over correcting every time no matter what. I've tried EVERYTHING! Taking new darks, using bias, not using bias, using flat darks, not using flat darks, different ADU values from 3k all the way through 45k, sky flats, flat panels and on and on. Nothing works and I'm left with images that look like the one I've attached
bad_flats.jpg
2072 x 1411 - 2M