Can't tell what the update does, but Canon released a firmware update 08/31 (WIN) and 09/01 (MAC) for the RF 70-200 f2.8:
Canon Support for RF 70-200mm F2.8 L IS USM | Canon U.S.A., Inc.
Find support for your Canon RF 70-200mm F2.8 L IS USM. Browse the recommended drivers, downloads, and manuals to make sure your product contains the most up-to-date software.
www.usa.canon.com
Last edited: