I'm hoping someone can confirm what I'm suspecting - I should send this lens in for repair.
I have a Canon branded EF-S 17-85mm lens that's having a hard time locking the autofocus. It gets close and then just jumps between two points. I believe the lens is the problem, because it exhibits the same symptom on both bodies I have (Rebel XTi and XS.) Additonally, my other lenses don't have the same problem on either body. Manual focus on the problem lens works fine.
Can anyone speculate what might be wrong with it? Is it worth repairing? Should I send this directly to Canon for repair, or is there (in Canada) a best third party repair shop I should consider?
Thanks in advance,