Reviews and Problems with Sigma APO Macro 180mm F2.8 EX DG OS HSM
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Faulty on arrival
27 February 2013
Summary: Would not autofocus correctly, occasionally it did but more often it either tried then stopped or didn't try at all!, even when it did achieve AF the camera would not take the shot as it had not confirmed the AF to the camera. Tested on both a 5DII and a 7D with the same result. Returned to Amazon for refund. Cannot fault Amazon for the way they handled this, perhaps Sigma should start testing their lenses before they leave the factory!