Tech News: Sigma Has Three New Lenses
Sigma introduced three noteworthy lenses at Photokina: The 85mm F1.4 DG HSM Art lens features a re-engineered AF system with 1.3X the torque of its predecessor. The new 12-24mm F4 DG HSM Art lens
boasts the largest aspherical glass mold in the industry, according to Sigma. And the rugged 500mm …
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