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03-14-2011, 06:40 PM   #1
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OS Bigma and Teleconverters?

Has anyone played with the new OS 50-500mm Bigma and used the 1.4x and 2.0x Sigma TCs?

Do they auto focus at all, or are you stuck with manual focus in this combination?

03-14-2011, 06:50 PM   #2
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AF is not supported because the lens has a KAF3 mount and the teleconverter doesn't have SDM contacts.

Adam
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03-14-2011, 09:20 PM   #3
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Original Poster
QuoteOriginally posted by Adam Quote
AF is not supported because the lens has a KAF3 mount and the teleconverter doesn't have SDM contacts.
I was hoping that perhaps Sigma had left the screw mount in place on this lens and the TCs knew how to deal with this issue as they do with the 120-300/2.8 on other mounts.
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