Hi All,
Thanks very much.
I have done a re-processing of the M83 and uploaded it to:
https://savannahskies.smugmug.com/Galaxyies/i-z3mbQ9H/A
I had to throw out all the luminance data as it was just not good enough, it was affected for some reason by terrible light flares across the images, so this is just RGB binned 2x2 data - I thought I should just try and get a reasonable image and sort out my processing mistakes with it - I would appreciate your thoughts about the repro. I think it is still a fair way short of what I should be able to achieve.
Regards,
Tim