Originally posted by MichaelS I just received this lens after a long wait on a backorder. The AF function doesn't seem to be engaging. It make an initial search then seems to disengage and what I think is the motor just spins, The only thing I can do is to remove the battery to stop it. A note to B&H suggested to remove the lens, turn the camera off for two minutes, reattach the lens and turn the camera back on. Didn't work. Send help. Thanks
Is your battery getting old, of low quality, or not fully charged?
Also, you should clean your lens mount, and wiggle the lens slightly after mounting to ensure that the gears are engaged.
Adam
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