The Sigma 135mm F1.8 DG HSM Art lens is a medium-range telephoto lens designed for modern high-resolution DSLRs. A new large Hyper Sonic Motor (HSM) provides sufficient torque to the focusing group for exceptional speed, ensuring stable performance even at lower speeds. This advanced lens features a sealed mount for guaranteed performance in any condition, and its large 1.8 aperture allows for more creative control in photography. An impressive compression effect makes the Sigma 135mm F1.8 Art the ideal portrait lens, while its large aperture also facilitates event photography and much more. Like every Global Vision lens, the Sigma 135mm F1.8 DG HSM Art is manufactured at our factory in Aizu, Japan, and undergoes individual evaluation before leaving Sigma's facilities.