Hi guys, here's two shots of M20. Flat/Bias and Bad Pixel Map applied.
The first one wasn't color corrected. It shows a fair bit of green tint to it:
http://www.multiweb.com.au/astro/m20_original.jpg
This one is the same shot but I used levels in photoshop to tone down the green. As soon as I did that it seems the rest of the colors fell into place.
http://www.multiweb.com.au/astro/m20_levelled.jpg
I processed the subs in Nebulosity. There is still a fair amount of vignetting and gradients in the pictures. Is any one using this program to stack and do you have any tips? I'm battling with the best way to do flats at the moment, exposure times, brightness etc... and getting rid of those gradients in my pictures. Also do you have a strong green channel in your exposures with the QHY8?
Thanks for any pointers.