Nov 30, 2021 Jaron Schneider Zhong Yi Optics Launches the Mitakon Speedmaster 90mm f/1.5 Lens Zhong Yi Optics has announced the Mitakon Speedmaster 90mm f/1.5 manual focus portrait lens for full-frame Leica M, Canon RF, Sony FE, and Nikon Z mounts. Nov 30, 2021