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Hi Baz,
Great shot, fabulous round stars which is usually the main battle.
There is a blue bias to the image. I played with it in Photoshop and the blue histogram was further to the right than the green and red. I moved it back using an S shaped curve in the blue channel and then pulled back green as well afterwards. Then I boosted red with a more upside down J shaped curve.
It got rid of the overly blue stars and boosted the red in the nebula and made the image slightly darker with more contrast. It is a tad bright in the highlights and it is washing out the dark space areas a bit.
Then a touch of selective colour on red and the top slider made a richer red.
Couldn't get a gain doing anything else.
So try playing around with curves. When you do, make sure you select histogram in the window menu so it displays a histogram for RGB and you'll see the blue bias.
Greg.
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