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Old 23-12-2022, 02:48 AM
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Astrofriend (Lars)
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Astrofriend is offline
 
Join Date: Aug 2017
Location: Stockholm, Sweden
Posts: 487
Hi,
I have some old photos of comets taken on film and to the first digital cameras I didn't have correct flat frames. I have used AstroImagesJ to make synthetic flat frames. But didn't work very well when the shape of the vignetting was too complicated. Then I took a new look at Gimp and what it can do. Found it to be very advanced and relative easy to correct the vignetting.

I added a new page on my Gimp tutorial how to do this:
http://www.astrofriend.eu/astronomy/...ignetting.html

Merry Christmas to you all !

/Lars
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