Solved: Autofocus not working on 18-55 mm lens and 18-135 ... - Canon Community
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Canon EF-S 17-55mm f/2.8 IS USM repair autofocus hunting problem (cleaning the focus strip) - YouTube
What to do When Your Camera Won't Focus
CANON EFS 18-55mm CAMERA LENS - AUTOFOCUS DOES NOT WORK | eBay