Firmware Notice: RF100-300mm F2.8 L IS USM: Firmware Version 1.0.8

Firmware Version 1.0.8 incorporates the following fixes and enhancements:

1. Improves AF tracking performance during zoom operations in still photography when used with specific cameras*1. Enhances smoothness of AF tracking during zoom operations in video recording. *1 Applicable cameras (as of February 20, 2025): EOS R1/EOS R5 Mark II If the lens's firmware is already version 1.0.9, it is not necessary to update the firmware.
2. Fixes an issue that, in rare instances, may cause Err 60 to occur when the camera is turned on or resumes operation from the [Auto Power Off] state.


Support

Download Firmware Version 1.0.8 for the RF100-300mm F2.8 L IS USM.

To help obtain optimal performance of this camera, we recommend that you download the most recent version of the RF100-300mm F2.8 L IS USM manual.

If you have not already done so, please register the RF100-300mm F2.8 L IS USM. By registering, we will be able to notify you via email about future announcements.

This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region.

Thank you,
Canon U.S.A., Inc.

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