Sigma has updated the firmware for their popular mount converter (Canon AF to Sony E), the MC-11. In a press release, Sigma said
By updating the firmware, the lens will offer improved AF performance. In addition, the latest firmware for the SIGMA MOUNT CONVERTER MC-11 SA-E will allow compatibility with the SIGMA 14mm F1.8 DG HSM | Art and the SIGMA 24-70mm F2.8 DG OS HSM | Art, and also enable the OS mechanism to start operating faster than before.
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