The Sigma 50mm F1.4 DG HSM Art is a full-frame standard prime adapted for Sony FE mount, featuring the Art-series optical design with 13 elements in 8 groups. It uses HSM autofocus and a 9-blade circular diaphragm. The lens is part of Sigma's Global Vision Art line.
Product released: September 1, 2018
Latest firmware version
Version 02, released July 18, 2019
What's new in version 02
It has improved the AF speed.It has improved the AF accuracy when the Face Detection setting is turned on, while using AF.With the Sony α9 or Sony α6400, it has corrected the phenomenon whereby the AF stopping position occasionally had a variation when shutter was half pressed repeatedly during auto focusing on the same subject.