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billD80 Silver Member Nikonian since 22nd Jan 2007
Tue 19-Mar-13 03:43 PM | edited Tue 19-Mar-13 03:45 PM by billD80

Before people had D7100's in their hands, KR mistakenly posted on his site about some of his readers having D7100/Sigma lens compatibility problems.

I'm convinced he was referring to the D7000 (which DID have some Live View issues with SOME Sigma lenses, that required new firmware). I own 2 of the affected lenses (made BEFORE the D7000 was released, and had the firmware updated for the D7000...

I've now tested my Sigma 150/2.8; 8-16mm; and Tamron 17-50/2.8 (non OS/VR edition). ALL work perfectly on the D7100, using the viewfinder focus, and LiveView modes.

In Live View, AF-S, single point mode, it sounds like the camera sets and re-sets focus, but the focus is dead-on.

In regular mode the focus is fast and dead-on (seems faster than LiveView).

My Sigma 50/1.4 also appears to be fine, compatibility wise, but it's not in my hands right now to double-check the LiveView aspect.

Now, if someone has Sigma lenses made BEFORE the D7000 was released, and didn't get the D7000 firmware, I don't know what their results will be on the D7100.

Sigma lenses made AFTER the D7000 was out (with that firmware), may well be totally fine on the D7100.


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