From Sigma:
SIGMA 120-300mm F2.8 DG OS HSM | Sports for CANON EF
This firmware corrects the phenomenon whereby it does not reflect the changes set by custom mode on SIGMA Optimization Pro.
For customers who own the SIGMA USB DOCK and applicable product 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.1.5.0 or later.
Benefit of the update
SIGMA Optimization Pro Download page
This firmware makes the SIGMA MOUNT CONVERTER MC-11 compatible with the latest firmware of SIGMA interchangeable lenses, and improves the AF speed when it is used in combination with the SONY a9 or SONY a7 III and the SIGMA 135mm F1.8 DG HSM | Art.
For customers who own the SIGMA MOUNT CONVERTER MC-11, please update the firmware via SIGMA Optimization Pro by connecting it to a computer using the supplied USB Cable. Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to Ver.1.5.0 or later.
Before attaching the updated SIGMA MOUNT CONVERTER MC-11 to the camera body, please remove the battery pack from the camera and put it back in again.
SIGMA MOUNT CONVERTER MC-11 SA-E
Benefit of the update
* For customers who own the SONY a9, please update the firmware of the camera to Ver.5.00 or later.
SIGMA MOUNT CONVERTER MC-11 EF-E
Benefits of the update
* For customers who own the SONY a9, please update the firmware of the camera to Ver.5.00 or later.
SIGMA Optimization Pro Download page
This firmware makes the SIGMA ELECTRONIC FLASH EF-630 compatible with the full-frame mirrorless cameras released by Canon Inc. and Nikon Inc..
For customers who own the SIGMA FLASH USB DOCK FD-11 for CANON and NIKON and applicable products listed below, please update the firmware via SIGMA Optimization Pro.
SIGMA ELECTRONIC FLASH EF-630 for CANON
Benefits of the update
* To update the firmware, the SIGMA FLASH USB DOCK FD-11 for CANON mount which is updated to Ver.1.01 is required.
SIGMA ELECTRONIC FLASH EF-630 for NIKON
Benefits of the update
* To update the firmware, the SIGMA FLASH USB DOCK FD-11 for NIKON mount which is updated to Ver.1.01 is required.
Before updating the SIGMA ELECTRONIC FLASH EF-630 firmware, please ensure SIGMA Optimization Pro has been updated to Ver.1.5.0 or later from the download page below. The firmware update will take approximately 3 minutes to complete.