From Sigma Global:
Firmware update for Canon RF Mount lenses
Thank you for using SIGMA products. We are pleased to announce that the download of firmware for SIGMA's RF Mount is now available.
The changes in this firmware are as follows:
Applicable product and version
SIGMA 10-18mm F2.8 DC DN | Contemporary Ver 1.0.1 for Canon RF Mount
SIGMA 18-50mm F2.8 DC DN | Contemporary Ver 1.0.1 for Canon RF Mount
Benefit of the update
How to update
Please select the applicable product from the following page, go to the download page, click "Canon RF mount", read "Before updating" prior to updating the firmware and follow the update procedure
https://www.sigma-global.com/en/support/firmware/lenses/?mount=canon_rf
*After the update is complete, be sure to remove the battery pack from the camera and reinsert it.
For further information, please contact your nearest authorized SIGMA subsidiary / distributor. https://www.sigma-global.com/en/world-network/ We appreciate your continued support for our company and products.
Learn more about these lenses:
Sigma 10-18mm F2.8 DC DN Contemporary Lens
Sigma 18-50mm F2.8 DC DN Contemporary Lens.