Question about Canon EF-S 18-55mm f/3.5-5.6 USN Lens
Please attache lens to your camera and set your camera to AV mode and set max. appeture 22 or more and front right side of camera there bottom edge of lens mount ring there is small black button.
press that button with shutter button and put your camera under light and press both button and check lens shutter is opening and closing properly if not and you getting err99
then lens diaphrm unit is faulty you need to replace it.
Posted on Aug 11, 2010
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Posted on Jan 02, 2017
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