I have been using
Larry
I have been using
But those settings only make "micro-level" changes, not the "macro-level" ones that we need to reduce the gradients that we experience, right?Larry 1969 wrote: ↑Sun Feb 06, 2022 6:28 pm There is a setting in APP under the "Calibrate" tab for master flat integration. "Automatic" is the default. The other choices are "average", "median" and "maximum". According to the help, "automatic" will choose between "average" and "median" depending on the number of flats. Less than 20 it selects "median" and more than 20 gets "average". "Maximum" says Use maximum to show all outliers / artifacts (with too high ADU values) in the data like hot pixels, cosmic rays etc.
I restacked my image using "maximum" and it made no visible difference...
I'll keep fooling around I suppose...
Larry
I'm sure you're right. Most of this is over my head...
Thanks but I think I'm doing it right.han.k wrote: ↑Mon Feb 07, 2022 10:42 am There must be something wrong in the processes.
1) The gain used for the lights, darks, flat and flat-darks must be same.
2) Exposure time and temperature of the lights & darks should be the same
3) Exposure time and temperature of the flats & flat-darks should be the same
4) Flats should be made with the same filter as the lights.
5) Flats should not be overexposed (saturated)
Han
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