Four Thirds User (Fourthirds-user.com) is a sibling site to the e-group.

We've been over to the Sigma booth at Photokina to have a play with the latest Four Thirds lens from the independent lens manufacturer, the Sigma 50mm f/1.4 EX DG HSM, equivalent to a 100mm f/1.4 and ideal, on paper, for portraiture.

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