Got them - I see what you are describing when cycling through the Deghost Amount Settings. Is this what you are referring to? If yes, what I see is caused most likely by the 2-stop bracket long exposure settings (15 sec, 30 sec. and 6 sec). I tested each Deghost setting with High being the most successful.
It still requires more editing, I was only looking for the artifacts, but High has the most amount of sharpness and the least amount of ghosting.
There's a number of ways to expose for this scenario with trade-offs no matter what choice you make. If you want movement in the sky and clouds and tack sharp foreground, center, background and you don't want to composite the image I do wonder if more brackets (from 3 to 5 or 7 or even 9 exp.s) would be beneficial.
I hope others that have made similar images without compositing them will chime in and share their experience.
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