I have been using the Canon 17-85 mm IS lens on a 30D for about three years. Two weeks ago the camera seemed to be having a problem with autofocus in finding a focus point. I was using it outdoors in about 20 degree weather for about 30 minutes. I tried my other lenses on the same camera and they worked fine, so the issue appears to be in the lens. When I push the shutter down, the lens moves in and out trying to focus but fails to do so. Anyone else have a similar problem? I am assuming this is in the electronics in the lens. Solutions? (Apart from buying a better lens, that is.) Thanks for any suggestions.
Jmac