Andromeda galaxy stacked raw tif white balance problems

[realflow100]

Taking a set of 800 frames of andromeda 4s exposures iso 400 50mm F1.8!
With canon SL1/100D camera

Clear night skies no moon or clouds at the moment! WOOHOO!!!
This time full 18MP resolution raw images.
untrackled
I also spent a long time getting PERFECTLY perfect focus as well. for the smallest stars.

I'm in approximately high bortle 7-8


EDIT:
I finished stacking but i have a SERIOUS WHITE BALANCE PROBLEM
Andromeda keeps turning blue-cyan no matter what I do.
I have uploaded the raw stack/tif file to mediafire if anyone wants to have a crack at trying to at least fix the white balancing problem. Nothing seems to work!

https://www.mediafire.com/file/i1mrh33n ... t.TIF/file

[Jockinireland]

Hi There,

I downloaded your file and had a go at it. There is not really any white balance problem but you have really horrendous gradients. I tried my best with both Pixinsight and APP but just could not resolve them - below is the best I could get.

I am not really sure whats causing them - the initial raw stack has a fairly even gradient which I think is probably your LP. When thats removed the underlying funky radial gradients show up and its beyond my ability to resolve. Sorry! If i was to guess, I'd say it could be internal reflections - do you have a bright point light source close to your rig - like a street lamp or security light? You also have quite bad CA and bad shaped stars out at corners - maybe try stopping your lens down a bit?

I hope that maybe helps a bit.

This is the best I could get to. I did try further background extraction but really it was making it worse.

[realflow100]

Try cropping to just the galaxy if you can. that might help

and try to fix the white balance problem (Something is really off with it. even after trying to subtract the background/light pollution. its causing some strange blue-cyan-green tint to andromeda that i cant get rid of)

[Jockinireland]

Try cropping to just the galaxy if you can. that might help

and try to fix the white balance problem (Something is really off with it. even after trying to subtract the background/light pollution. its causing some strange blue-cyan-green tint to andromeda that i cant get rid of)

Sorry, but I've done as much as I can with that. Cropping in to just the galaxy is just hiding the problem of your gradients instead of resolving it and the resolution is not high enough to crop in that far without pixelation.

As I said above, there was no green blue cyan white balance issue when I took it through APP and PI nor in the image I posted above. If you boost the sat on that then it goes brown gold. If your seeing it as blue green you may have an issue with your monitor.

And by the way, a quick "Thanks for taking the time..." might have been nice before telling me what I need to do now.

Good luck.

David

[realflow100]

i doubt its an issue with my monitor because its distinctly different from every other andromeda picture i see everywhere else.
my other images dont have this white balance issue I can just subtract the light pollution normally and dont have this problem. very weird.