Hello everyone, this is my first post at P.O.T.N, thanks for helping. I recently bought a refurb Canon 60D using CLP and base on gphoto2 it has 2,500-ish shots and some minor scuffs on the top panel, but otherwise all good. I have seen much lower counts on this forum, but 2,500-ish is about 2.5% of 100,000, so I don't feel too bad, since it's refurb.
On a more important concern though, the 18-135mm kit lens on one occasion "froze" as I was autofocusing, there is a low humming noise coming from the lens, almost as if the lens is trying to move but can't. I then tried many different things, switching from auto to manual and back, turning the camera on and off, and after a minute or two the lens returned to normal. Before this episode, I was testing the burst rate and buffer capacity of the camera.
Since then, I hadn't been able to reproduce this incident. I am hoping that this is an isolated incident, but this is the first time I have seen this. (OK, not exactly. I once had a Sigma that can't focus, but as it struggles I can hear some mechanical grinding, the canon only has a low humming noise). I am debating if I should call Canon up to exchange, but I am not sure if the replacement is any better or worse. Is this a sign that the lens is not going to last long? Should I exchange? I appreciate any suggestions!