Canon EOS R6 Mark III & RF 45 F1.2 STM November 6
- EOS Bodies
- 684 Replies
Yes, you've reminded me that I really should send my EF 70-200mm f2.8 II L off to Canon for a service. Mine is a bit battered too and I've recenently noticed that the center moves when I zoom. It's not the IS, it looks like some of the internals are de-centered slightly. It still gives amazing and sharp images...but zoom bursts look a bit off center to to the optical alignment.
That could be the IS. IS works by intentionally tilting the IS group.
If one of the plastic tabs that hold the IS stationary when not needed is broken, it might show up in the way you describe. Roger Cicala talked about those tabs a bit in several blog entries back in the day. He emphasized that IS should be turned OFF while the camera is powered on before storing and transporting it. Lensrentals had several of those lenses returned with broken tabs, and every one of them had the IS left on and not centered/parked when it was removed from the body. (The lensrentals blog appears to be offline currently or I'd include a link.)
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