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Sigma macro lens

Started Aug 22, 2014 | Discussions thread
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maggymay New Member • Posts: 2
Sigma macro lens

I recently bought a Sigma 105mm macro lense for my Canon 450D. I only tried it on the 2.8 f stop when I bought it but when I got home found it completely locked the camera on all other appertures.  I now believe this could have been a lens for the old film cameras.  Is it possible to have it re-chipped?

Canon EOS 450D (EOS Rebel XSi / EOS Kiss X2)
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