Stephane,
A nice capture of M16
I don’t know how you managed 20hrs , the weather has been atrocious, must have been over weeks and weeks ?
My observations only….
Framing A1
Focus A1
Detail A1
Contrast a bit weak between core region and outer region
Colour a bit washed out , I don’t know how you managed the grey tones, some blues , greens and red / tan would give it some depth. At 20 hrs the L Extreme should provide enough Ha and Oiii to map and process the colours in a SHO or HOO pallete.
Stars definitely look odd , as if they have been painted on with a circle template
There are no diffraction spikes from your Newt or any halo at all around the stars, a bit artificial looking
Other than that an excellent image and well done for effort alone
Cheers
Martin
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