Sigma 70-200 2.8 APO on 5D Mark III - no autofocus?

Started Apr 13, 2012 | Discussions thread
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Jim Garrison
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Sigma 70-200 2.8 APO on 5D Mark III - no autofocus?
Apr 13, 2012

Just got my 5D Mark III and tried it with my Sigma 70-200 (first version) and the lens will not autofocus.

The lens autofocuses fine on my 50D, AND gives focus confirmation on the 5DIII if I focus manually.

Is this a known problem?

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Jim Garrison
jhg@acm.org

 Jim Garrison's gear list:Jim Garrison's gear list
Canon EOS 50D Canon EOS 5D Mark III Canon EF 100-400mm f/4.5-5.6L IS USM Canon EF 100mm f/2.8L Macro IS USM Canon EF 24-105mm f/4L IS USM
Canon EOS 50D Canon EOS 5D Mark III
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