Sigma optics are usually compatible with bodies available at the time the lens is out. But older or newer bodies often have problems.

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From what I understand, this is a common problem with Sigma lenses. I understand also that if you send them an older lens, they will put a new chip in it at no cost.

FWIW, the current version of Pentax Photo Browser does not recognize the name of the DA 50-200. So we can probably expect a new version of Photo Browser, perhaps after the DL appears.

Joe


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