Has anyone experienced or heard about an issue with the EF 70-200L IS f/4.0 where when you focus (AF), there's a sudden "shift" in the viewfinder (or LV) combined with a small "bang" from the lens? I'm leaning towards the stabilizer motor causing the issue, but if I switch off the IS it may still happen. Any ideas before I send it in for service?
Possible defect in my EF 70-200L IS f/4
- Thread starter opheim
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