Canon has released firmware version 1.1.0 for the RF 70-200mm f4L IS USM lens, which incorporates the following enhancements and fixes:
1. Adds an electronic full-time manual focus function (a function that enables constant manual focus adjustment in both One-shot AF and Servo AF), which is enabled when using the EOS R5, EOS R6, and EOS R3 cameras.
2. Improves an issue in which the background is not blurred when
performing slow panning with the IS (Image Stabilization) mode set to
Mode 2 or Mode 3.
Firmware version 1.1.0 is for lenses with
firmware up to version 1.0.8. 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. Refer
to the camera instruction manual for how to check the current firmware
version. Before starting the
firmware update operations, please be sure to check the procedure in
accordance with the instruction.
The latest firmware can be downloaded at:
https://www.canon-europe.com/support/consumer_products/products/cameras/rf-lenses/rf70-200mm-f4-l-is-usm.html?type=firmware