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Old Mar 6, 2008, 8:19 AM   #12
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It means in very good light, with a subject containing a lot of contrast you might be able to get it to AF as the camera will not stop AF working (which would happen with the Canon and Sigma converters).

It is not an ideal situation as you are pushing the limits where a camera can AF so all that can be said is you might get functional AF when conditions are optimal.
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