Sigma 135mm f/1.8 DG HSM Art Lens for Sony E Mount

Sigma 135mm f/1.8 DG HSM Art Lens for Sony E Mount - 2 Year Warranty The Sigma 135mm F1.8 DG HSM Art is a medium range telephoto prime lens designed for modern high megapixel DSLRs. A new large Hyper Sonic Motor (HSM) delivers ample torque to the focusing group for outstanding speed, ensuring exceptionally stable performance even at lower speeds.