Dan Kearl avatar
I can remove this obviously but this is the Gradient in an RGB 4 hour stack taken in my backyard in Portland Oregon last night that I left in just for fun..
The Iris nebula is on the left side.


ValeryL avatar
Eh,

I have 1h of blood red Iris nebula smile

After many stacking test, I integrated the red subs in the stack withour any gradient! 
It was 1200 x 15s subs so I guess the red pixels just got rejected during stacking.

Clear skies
Kay Ogetay avatar
I have to say, it gives an interesting touch to it smile Thanks for sharing. I was shooting a day before the Aurora, and there was still low Kp Aurora out here and realized some of my R filter images catch it. I was wondering why the final image has a red/purple tint to it…
SoDakAstronomyNut avatar
You could say you got some Iris gradient in your Aurora subs and call it a win. CS & GB! Kip
Tobiasz avatar
You could say you got some Iris gradient in your Aurora subs and call it a win. CS & GB! Kip

Lol, that would be the prettiest gradient someone could have in their subs