I recently used my Canon 17-55mm f/2.8 IS for a sweet 16 I was hired to do and I was working with low light so I turned on the IS.
About 2 hours into it the IS starts jerking around quite violently like it was stuck or something. he picture in the viewfinder would vibrate, blurring the picture and that prevented a couple of would-be shots from happening.
It happened most midway zoom and even more when I held the camera in portrait orientation....
Unfortunately it's over a year old and no longer has a warranty. I'm just mad cause it's not even that old.
I'll see if it happens again and send it to Canon....I hope its not expensive to fix. Just wondering if someone had a similar case with this lens.


