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Ah a fellow Greg!
Nice image, and you captured the nice delicate colours.
When you processed the image though you have clipped the background.
What that means is with levels you have moved the left hand slider too far to the right and it cuts out data that is in the darker parts. It makes the background blacker but there is also some data in that band. So the usual
thing here is to move that slider to just before the bellcurve of data begins.
In other words leave a bit of space to the left of your histogram when processing. Faint nebula and delicate colours are in that area of the histogram.
Greg.
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