Sigma 50mm F1.4 ART DG HSM Lens for Sony A

The Sigma 50mm f/1.4 DG HSM Lens for Sony A has been redesigned and reengineered to set a new standard for the Art line. With a large f/1.4 aperture, the Sigma 50mm f/1.4 prime lens is pro level performer for shooting everything including portrait photography, landscape photography, studio photography and street photography. A Hyper Sonic Motor (HSM) ensures quiet, smooth and accurate autofocusing and paired with Special Low Dispersion (SLD) glass and Super Multi-Layer coating, the 50mm f/1.4 is a high performance lens for modern DSLR sensors. 13 elements in 8 groups allow for unsurpassed performance even at wide apertures and close-up photography is easily managed with a minimum focusing distance of 40cm. The Sigma 50mm f/1.4 lens is the new exceptional standard, standard prime.Features: Aperture Range: f/1.4 to f/16 One Molded Glass Aspherical Element Three Special Low Dispersion Elements Super Multi-Layer Coating Floating System & Large Diameter Design Hyper Sonic AF Motor Rounded Nine-Blade Diaphragm Thermally Stable Composite Material Brass Bayonet Mount Compatible with Sigma USB Dock USB Dock CompatibilitySigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus. *USB Dock is sold separately.