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Stephane,
Really nice image of the Rosette
Well done !!
Nothing stopping you now , full steam ahead !!!
The odd shaped stars in the areas towards the corners of the image look very much like coma to me as they are flared to the corners. Had the same issue with my 8” f5 newt with a Baader MCCP Mk3. After 2 weeks of experimenting, a 1mm spacer fixed my issue with the sensor now 56mm from the coma corrector instead of 55mm ( all scopes are different) If it was tilt or reverse flop in the camera you would most probably see the stars odd shaped in the same direction across the field.
Anyway, great work
Clear Skies
Martin
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