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Well done, Kevin. The faint outer extensions have come up beautifully, especially the OIII which is difficult.
We wonder if you might have over-smoothed the image to reduce noise in the faint outer extensions, and thereby lost bright detail in the core.
One way to avoid that is to use wavelet noise reduction, which will get rid of a lot of noise in the faint background but won't touch your brights.
Another possibility is that it was at low altitude and the seeing was very bad. The stars do look a bit blurry. Nothing you can do about that, and it doesn't detract from your magnificent achievement with the outer envelope.
Best,
MnT
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