Firmware Version 1.1.0 incorporates the following improvement:

1. Improves the image stabilization performance when using the electronic shutter of the EOS R3 to perform still shooting.

Firmware Version 1.1.0 is for lenses with firmware up to Version 1.0.9.  If the lens’ firmware is already Version 1.1.0, it is not necessary to update the firmware.

You can check the firmware version of the lens from the camera menu. 

Please download the updated version of the RF100-500mm F4.5-7.1 L IS USM Instructions.

Download Firmware Version 1.1.0 for the RF100-500mm F4.5-7.1 L IS USM.

If you have not already done so, please register the RF100-500mm F4.5-7.1 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,
Customer Support Operations
Canon U.S.A., Inc.

Contact Information for Inquiries
Canon Customer Support Center
Phone: 1-800-OK-CANON / 1-800-652-2666
TDD: 1-855-270-3277
Email: carecenter@cits.canon.com

Support options and hours of operation: www.usa.canon.com/support