Strange round camera lens borders

Hey folks

I got a lens issue, getting these weird round edges ony my cam view, no idea where they come from. I tried to rule things out, but nothing made them disappear. They move when I change the camera focal length though, so guessing it’s gotta have something to do with the camera setup? I could make them disappear by moving the focal length in far enough, but I really don’t want to change this camera setup. Any ideas where this could be coming from?


My first thought is that this is a Vignette applied through post processing. (Although I’m not sure what to make of the sharp edge)

Do you see any difference when turning off Post Processing?

Thanks for the suggestions. Turning off post processing doesn’t fix it unfortunately, neither does turning off the vignette effect.

Any ideas anyone?