Ray,
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Stars can have only a very limited range of colours because they have essentially black body spectra, but it is common to see star images that seem to be of much deeper saturation than is possible. Is there any good reason why star colours should be realistic?
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Hi Ray,
I now think that star colours should be correct & artistic license
allows an image processor to boost their colour.
I haven't always followed this but now try to.
It can be difficult due to halos when using Ha as luminance.
If you equalise the humps in RGB and after later doing a minor LAB colour boost
certain stars are either Red Yellow or Blue etc & then
when checking many other pics you find the same colours -
then boost them to at least show their real colour.
I think that adds authenticity to the image and is valuable data
that should be highlighted by a slight boost in colour.
I'll think about your other questions.
cheers
Allan