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DPChallenge Forums >> Hardware and Software >> Sigma Teleconvertor...loss of autofocus
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 09/20/2009 02:27:15 AM · #1
I bought a Sigma teleconvertor (2.0) in May. Haven't used it much yet, but I will need it for next week...Anyway,my 70-200 2.8 (Nikon) looses it 's autofocus when combined with the teleconvertor. It tries to autofocues but it can't. Or if it does it's completely off. Is this normal?

09/20/2009 03:41:56 AM · #2
I had that problem with the tamron 1.4 converter on my 70/200 did the same thing now i just go with nikon converters
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