As I reported earlier today, Sigma officially released the four Sigma f/1.4 prime lenses for Canon RF mount. Pre-orders are already open. Here are the launch dates:
Sigma's APS-C size mirrorless dedicated prime lenses, the SIGMA 16mm F1.4 DC DN | Contemporary, SIGMA 23mm F1.4 DC DN | Contemporary, SIGMA 30mm F1.4 DC DN | Contemporary and SIGMA 56mm F1.4 DC DN | Contemporary will now be available for the Canon RF Mount.
A control algorithm including AF drive and communication speed optimization has been developed specifically for Canon RF Mount interchangeable lenses. In addition to realizing high-speed AF, the lens also supports Servo AF and in-camera aberration correction*. The mount is rubber-sealed to cater for use in a variety of environments.