News
Firmware update for Canon RF Mount lenses
Firmware
2026.08.27
Thank you for using Sigma products.
We are pleased to announce that the download of firmware for Sigma's Canon RF Mount is now available.
The changes in this firmware are as follows:
【Applicable product and version】
- Sigma 16-300mm F3.5-6.7 DC OS | Contemporary for Canon RF Mount Ver.1.0.1
【Benefit of the update】
- Fixed an isolated issue where the monitor blacks out and the camera freezes during shooting when used with the Canon EOS R6 Mark III.
- Improved autofocus (AF) operation speed.
- Optimized peripheral illumination correction data to improve correction accuracy.
【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/?category=lenses&mount=canon_rf
For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
We appreciate your continued support for our company and products.