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Paul
Great image of the witch head
Well done !!
Even better as you traveled so far to get some clear skies
Only a guess but I reckon your eggy stars may be caused by tracking / guiding problems as its ok on the far left of the frame and progressively gets worse as you move across to the right side
Why 10 minute subs on a nebula ?? the 2600MC has a super high dynamic range with a QE of over 80%
Are you running the Ascom driver on HDR ( gain 0 )
I find the sweet spot for cooling on mine is -10 to -15C , what do you cool yours down to ?
Try shorter subs say 3 to 5 minute with more subs , it may resolve your eggy stars ??? Worth a try ??
Martin
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