Quote:
Originally Posted by brajoh
Andy, thanks for the constructive comments -- very obvious when you say so about the stars -- I have a bit of an addiction for Autohistagram for getting contrast so I'm sure you're right about the clipping - not sure how to check for that myself.
I reprocessed with star removal, read Ha only stars (all white but at least sharp) and reprocessed from preprocessed masters using NBRGB script to get what I feel is a much more pleasing colour balance with still a focal point at the "face". I would be grateful for your comments again.
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Hi again, yes much improved imo.
The subtle nebulosity is revealed and the colour palette is much more appealing.
Best avoid any kind of auto stretching and keep a close eye on the histogram so the foot is well clear of the far left hand side.
There's still something odd about the appearance of the stars though? They're not that sharp or round, and have pronounced haloes.
Not sure which technique you're using there, but Starnet++ could be worth visiting to initially remove them, then create your HaRGB composite with colours & density to your personal taste. Then layer the original Ha with the stars still intact over the top as luminance only.
Assuming your original Ha image has no tracking, spacing or tilt issues and was well focussed, your stars should look good!
Hope that helps