How to tell if I have a bad copy of the Sigma 50 F1.4

Started Jan 5, 2013 | Discussions thread
MgrBuddha
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Re: How to tell if I have a bad copy of the Sigma 50 F1.4
In reply to dannieboiz, Jan 8, 2013

I tried three copies, and they all had a slight back-focus problem. Enough so that portraits taken with AF at f/1.4-2.0 would give me sharp nosetips instead of eyes. Then I tried a Canon 50 1.4 and it was perfect so the choice was simple. Try out the battery test, and you will find out.

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