EF -S 17-85mm f4-5.6 IS USM autofocus stutter

Started Dec 8, 2009 | Discussions thread
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EF -S 17-85mm f4-5.6 IS USM autofocus stutter
Dec 8, 2009

I've been happily using an EF-S 17-85mm f4-5.6 IS USM lens for a little over 2yrs with my Canon EOS 400D. Recently the lens has begun to "stutter" (i.e., not lock in) especially when approaching full zoom. I tried cleaning the lens mount contacts, which didn't help. A different lens on the same camera works fine, so the issue appears to be with the EF-S 17-85mm.

Any ideas about what might be the problem with this lens and recommendations for how to fix it would be appreciated.

Thanks.

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