Hey Rob,
Nice capture of the trio - well done. There's plenty of detail to look at in all three galaxies, and the colours are good to my eyes.
I do see some sort of stacking artifact across the top of the image, sort of a grey gradient that's most obvious in the top-left corner, and there seems to be a soft 'halo' around the bottom-right galaxy. It could be noise, but it could be a mist of stars around the galaxy.
Cheers,
V
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