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Hi Kevin,
thank you for your response. It seems plausible but I wonder if it couldn't be caused by something else.
I read a lot about astrophotography but dithering was only ever mentioned in conjuction with retaining star colours in exposures long enough to saturate stars. These streaks aren't visible in any of the single exposures.
Couln't be a slight misalignment in the stacking process, maybe introduced by slight field rotation due to a slightly misaligned mount?
Please correct me if I am headed in the wrong direction.
cheers
Max
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