Problems with my 17-40f4L
Suddenly, the lens does not focus right anymore with my Rebel xsi. It hunts, and 50% of the time when it indicates focus, it will be completely out of focus (completely blurry even through the viewfinder).
I cleaned the lens and the contacts with no success. My xsi focuses fine with my other lenses.
It's probably time to send it to canon for service, but I thought I'd check here first to see if somebody else has seen this before.
Thanks for any input!
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