Is focusing problems on Sigma lenses still a problem on a Canon body?

Question

I am considering purchasing the Sigma 70-200mm f/2.8 EX DG HSM II Macro Lens. The problem is that many reviews point out that the lens has front focus problems, at least on a Canon mount. But those reviews date back to 2008, so things could have changed.

I have also been told that newer Sigma lenses (2010 and later) should have dealt with their focus problems.

Is that so? Can I purchase the lens and trust it to focus correctly? I have the 500D which does not have micro-focus adjust.

Asked by Pete

Answer

SOME Sigma (and indeed all 3rd party) lenses have problems on SOME Canon bodies. IF the lens is under warranty when this happens, afaik Sigma will fix the problem (which has to do with Canon's constant changes of their AF logic body/lens interface, requiring Sigma to change their chipset with nearly every new body Canon releases. It's a subtle trick by Canon to push people into buying Canon lenses...

Answered by jwenting

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