I have an EF 70-200mm f2.8L IS II lens that all of a sudden started rattling. Even just moving it around gently, you can hear the rattling, and if I look through the rear of the lens, I can see a ring that's shifting around. My best guess is that it's the IS module that's somehow come loose or something. Just wondering if anyone has had any experience with this, and how serious it is. I generally prefer to send all my repairs into Canon, but if it's as simple as opening the lens and tightening a few screws, then I might consider taking it to a local repair shop.
Thanks in advance,
Send it in to Canon for repair.