Sigma filed a patent in Japan for a 24-70mm f/2.8 DG OS HSM Art lens. In the past there have been rumors about a new Sigma 24-70mm f/2 OS HSM lens, but we have not seen an official announcement yet. Here are the patent details: Patent: 2016-38502 Published on: March 22nd, 2016 Filed on: August 8th, … Continue reading Sigma filed a patent for a 24-70mm f/2.8 DG OS HSM Art lens