I was out playing again last night:
http://www.mikemac.com/Astrophotos/M27-2019-05-30-RGB.png
My capturing is getting a bit better. But my flats are still causing trouble.
Whenever I apply the RGB flats and then do background neutralization, I
introduce a red vignetting:
http://www.mikemac.com/Astrophotos/red-vignette.png
It’s always a red vignette. Before neutralization, the background can be cyan
or red. But afterwards, it’s always a red vignette.
If anyone has an idea of what I’m doing wrong and/or how to fix it, I’d love to
hear from you!
Mike McDonald
mikemac@xxxxxxxxxxx
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