Sigma 35mm f/1.4 DG HSM Art Lens for Canon EF and MC-11 Mount Converter/Lens Adapter for Sony E Kit (ZH954) The first addition to the Art category in Sigmas Global Vision, the 35mm 1.4 DG HSM includes new features based around a unique lens concept and design. he 35mm is a staple focal length in the world of photography, and paired with Sigma technology, this lens can take artistic expression to the next level. A Hyper Sonic Motor (HSM) ensures quiet, smooth and accurate autofocusing and paired with Special Low Dispersion (SLD) glass and Super Multi-Layer coating