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Suspect something went wrong during processing, Martin. You've got lots of little background galaxies showing that your raw data must be sharp and deep, but the main galaxy looks nothing like how it should.
My suspicion is that you've used much too much noise reduction, and then sharpening trying to correct for the noise reduction.
It would be great if you could re-post it without any sharpening or noise reduction, because it seems the underlying data are very good.
Another possibility is that you've processed it as an 8 bit image, resulting in posterization.
Very best,
Mike
Last edited by Placidus; 27-10-2017 at 06:16 PM.
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