Thank you for purchasing and using our products.
We would like to announce that a new firmware update for the 50-100mm F1.8 DC HSM | Art for SIGMA and Canon is now available.

This firmware corrects the phenomenon that the AF performance occasionally becomes unstable when used via SIGMA MOUNT CONVERTER MC-11.

For customers who own the SIGMA USB DOCK and applicable products listed below, please update the firmware via SIGMA Optimization Pro※.

※ Before updating the firmware using the SIGMA USB DOCK, please ensure to update SIGMA Optimization Pro to Ver.1.4.1 or later for Windows, and Ver.1.4.0 or later for Macintosh.

【SIGMA Optimization Pro Download page】
https://www.sigma-global.com/en/download/lenses/sigma-optimization-pro/

【Applicable products】
・50-100mm F1.8 DC HSM | Art for SIGMA and Canon

【Benefit of the update】
・It has corrected the phenomenon that the AF performance occasionally becomes unstable when used via SIGMA MOUNT CONVERTER MC-11.

For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
https://www.sigma-global.com/en/about/world-network/

We appreciate your continued support for our company and products.