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Sigma 70-200 Autofocus
Oct 4, 2018 20:58:11   #
Stafford
 
I put a Sigma 70-200 APO DG on my Nikon D7100, it would not autofocus, then put the lens on a D90 and it would autofocus. I have a Sigma 18-35 that I use most of the time on the Nikon D7100 and D90. I can use a Nikon 70-200 on both cameras with out any problems. The Sigma 70-200 works fine on a D700 or D750. Any suggestions?

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Oct 4, 2018 21:31:39   #
LWW Loc: Banana Republic of America
 
Clean the contacts.

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Oct 4, 2018 21:31:46   #
MT Shooter Loc: Montana
 
Stafford wrote:
I put a Sigma 70-200 APO DG on my Nikon D7100, it would not autofocus, then put the lens on a D90 and it would autofocus. I have a Sigma 18-35 that I use most of the time on the Nikon D7100 and D90. I can use a Nikon 70-200 on both cameras with out any problems. The Sigma 70-200 works fine on a D700 or D750. Any suggestions?


Check your AF/M switch on the D7100 and make sure its all the way in AF mode

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Oct 5, 2018 02:36:40   #
rmorrison1116 Loc: Near Valley Forge, Pennsylvania
 
If you own a Nikkor 70-200, sell the Sigma lens, you don't need it.

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