The Sigma 50mm f1.4 DG HSM A Nikon fit is a high-performance, large aperture lens that joins the Art line within Sigma's Global Vision series, ideally suited for creative and artistic applications for photo and video use. Designed with a focus on sophisticated optical performance, this fast standard-length prime employs Special Low Dispersion (SLD) glass and Sigma's Hyper Sonic Motor (HSM) system to achieve fast, silent AF and the highest resolution in the focus point and exceptional rendering performance, even near the edge of the image. Furthermore, the lens firmware and adjustment parameters such as focus can be updated with the use of the Sigma USB Dock (available separately)
