Sigma 50-500mm HSM EX AF Canon EF lens won't unlock

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mrsmitty New Member • Posts: 1
Sigma 50-500mm HSM EX AF Canon EF lens won't unlock

I just received a Sigma HSM EX AF 50-500mm lens for Canon EF. However, the lens is in the lock position at 50mm and I can't get it to unlock. I've never had a lens with a lock on it so I don't know if there's some trick to it or what? I've tried rocking the zoom ring side to side while holding down the lock button and it won't budge. Any solutions? Thanks.

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