Hi all,
The more I do this astrophotography thing, the worse I seem to get.
I've collected about 30 minutes of subs of M42 with about 20 darks and 50 bias. Most of the subs are taken at ISO 1600 and 30 seconds, with about 1/3 at iso 400 and 30 secs, and 5 at iso 1600 and 90 secs.
Ive posted screen shots of the stacked files, tweaking of the RGB, then luminance & the saturation (histogram and settings included), and you can see the appalling results before your eyes. Firstly, there is an obvious stacking artefact - linear bands across the stacked photo which I assume is the different camera frame angles at the time of image acquisition. Then its impossible to get the blue and red without a green cast across the whole image.
Ive included a single sub (Iso 1600, 30 secs) which looks much better without doing any stacking or processing.
Should I have stacked the subs at ISO 1600 separately from the other ISO subs? How to I improve the colour balance?
Should I just give up and go back to visual only?
Thanks for any advice anyone can offer.
Luke