[mst]

[quote name='Lomskij' timestamp='1299833768' post='6672']

You mean they don't AF at all? I've tried a few sigmas and one tokina so far and they "sort of" AF in live view, but incredibly slow (like, over 3 seconds to lock in).

[/quote]



Ok, let me clarify: this seems to be an issue with older third party lenses only. And only for those who have an integrated motor. Anything screw-driven is not affected.



Obviously this is some sort of firmware issue, since I have lenses that did not AF when I got the camera, but now do after a trip to the manufacturer service (for other reasons). This happened for example with the Tamron 17-50 Di II.



Those lenses who are incompatible simply move a little bit in one direction each time they're supposed to AF and then simply stop.



But yes, AF in live view is slow in comparison.



Short list of lenses I tried:



Tamron 17-50 VC: no AF

Tamron 17-50 Di II: AF (after service)

Tamron 60/2.0 Di II: AF (has been to service, too, didn't try before)

Sigma 18-50/2.8-4.5 DC OS: working AF

Sigma 85/1.4 EX: working AF

Sigma 50/1.4 EX: no AF

Sigma 70-300 OS: no AF

Tamron 70-300 VC: working AF

Tamron 28-75/2.8: no AF



Any AF-S Nikkor I tried worked as expected.



-- Markus