So I was at a campsite in a bortle 3 zone last week, and it got nice and dark when the moon had set.
While waiting for the moon to set I decided to shoot NGC7000 - the North America nebula with my unmodded Canon 800D.
I have about 30 minutes of integration time on the subject, consisting of 5 minute subs.
I did a quick stretch on a single sub and noticed nice blue and red colors in the image, and I was happy before moving on to the next target.
The first picture is a quick stretch of a single sub.
When I got home, I stacked my images, added my flats, darks, and bias frames and started editing.
After a while I realized I couldn't pull out the blue colors, as can be seen in the second picture.
After a little bit of investigation I noticed my flat frames had a slightly blue color to them.
I stacked my frames without these flats, and managed to get the blue color back, as can be seen in the third picture.
My question is, how can I know what colors are the most accurate?
If I look around for this nebula online I see a lot of red/orange images, and barely any images with blue in them.
Is the blue simply an artifact of poor white balancing?
Did I make a mistake while recording my flat frames?
It would really help me to get some feedback on this, and maybe a few tips which could help me with this in processing.
Edited by Dane90, 17 August 2019 - 04:56 AM.