Sigma 30mm: Is this a good copy?

Started Aug 4, 2012 | Discussions thread
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Re: Sigma 30mm: Is this a good copy?
In reply to jesseclee, Aug 4, 2012

It's possible that the AF point (which is much bigger than the corresponding box in the viewfinder) picked up on something unintended, so rather than focussing on something behind the biggest target, put the AF point on the biggest target. A focus error will show up just as well that way.

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