RF 100-500 background distortion ? Please help

[ksmithson916]

I notice that most of my shots have this lateral line distortion in the foreground and background, is this a defective lens?

pics attrached

[johnrmoyer]

Which camera? Latest firmware?

I think that IBIS will sometimes do that especially after waking from sleep when the zoom moved while the camera was asleep. The IBIS did not notice that the zoom had changed during sleep and used the wrong focal length. If that is the case, then turning the camera off and back on again might fix it. The 1.6 firmware seemed to me to fix it for the EOS R5.

[ebiggs1]

"For future reference, how would the filter effect the photo? Thanks."

John some filters are not up to the high standards of top lenses like L series. The are simply lenses themselves and are not produced with top coatings and such. The can enter aberrations and reflections. Even the best can at a very very few circumstances do so. But they screw off as easily as they screw on.