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I am considering a lens for my 500d. Its an efs 17-85mm. However, the seller says "At full zoom (85mm) the autofocus sometimes has trouble locking on to the subject."Your thoughts?
 Found this lens at a really good price. Seller says the "film is loose" (arrows on the pic show where). Seller states lens still works fine. Thoughts? Advice? Thx!   
Hello,I saw a great deal on a 450D/XSI on ebay. Problem is, seller states the red dots in the viewfinder for autofocus are hardly visible....? Are they already kinda difficult to see? I'm not sure what that could mean. I did ask a few times for a des...