This firmware update allows compatibility with the SIGMA 14mm F1.8 DG HSM | Art, SIGMA 24-70mm F2.8 DG OS HSM | Art, Cine Lens 14mm T2 FF EF mount and 135mm T2 FF EF mount from FF High Speed Prime Line. For customers who own the SIGMA MOUNT CONVERTER MC-11 EF-E, please update the firmware … Continue reading SIGMA MC-11 Firmware Update