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Stephane,
Well done for your first Astro image
M42 is a superb target to get started with
Nicely framed too , although personally I like my diffraction spikes north south on an image , some folk don’t really bother
Did you crop quite a bit around the image ??
Background obviously needs cleaning up, but calibration and some processing can fix that issue
Also to get your PHD2 guiding up and running on a first attempt is a tremendous achievement, some folk struggle with it. Next time maybe push for longer subs up to 2 minutes and see how your stars fair
Did you use a coma corrector as I can detect a little bit of coma towards the corners or maybe Collimation is a tad out ??
So great result and very happy for you !!
On and upward from here ......
Clear Skies
Martin
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