[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
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
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