It wouldn't hurt to have it checked out.


I dropped my 16-35mm several times from like table distance, and it worked fine with one exception. At one time I noticed it making a whining noise when it focused in one direction. I sent it in, and they said that it had something bent. They fixed it under warranty.


I just recently dropped my 180mm f/3.5 Macro off my shoulder when it detached from my tripod after the release latch caught a strap on my backpack. The hood was on it, and got scrapped, and the 30D got a few dents in the body, but everything seems okay.


I don't advocate dropping them, but they seem pretty durable