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Sigma launches the 50mm F1.4 EX DG HSM large aperture lens. The fast F1.4 aperture makes this lens desirable for use with digital SLR cameras, where the lens effectively becomes an 80mm medium telephoto lens on cameras with APS-C size sensors. The lens has a minimum focusing distance of 45cm and has maximum magnification of 1:7.4. The rounded 9 blade diaphragm creates an attractive blur, and the HSM (Hyper Sonic Motor) ensures a quiet and high-speed AF as well as full-time manual focus override...
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