Sigma 311306 50mm F1.4 DG HSM Art Lens for Nikon Cameras
50mm F1.4 DG HSM ART- redesigned and reengineered to set a new standard for the Art line. 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 1.4 is a high performance lens for modern DSLR sensors.