Canon has issued firmware updates for its EF 400mm f/2.8L IS III USM and EF 600mm f/4L IS III USM lenses announced an up-coming update for the PowerShot G5 X Mark II.

Both lenses get firmware Version 1.1.2 which incorporates the following adjustments:

1. Increases the manual focus speed when relevant switch is set to 1 or 2. (The speed when the switch is set to 3 (slowest speed) will be unchanged.)

2. Improves the image stabilisation effect during handheld shooting with a slow shutter speed when used with EOS 5D Mark IV, EOS 6D, or EOS R.

New firmware is also available for the EF 400mm f/2.8L IS III USM, which enables a full-time manual focus function during Servo AF when used with the EOS-1D X Mark II. The lens must be sent to the Factory Service Center in order for this function to be enabled.

Click here to  access the page containing links for downloading the firmware for both lenses.

Canon has also announced an upcoming firmware update for its PowerShot G5 X Mark II compact camera, which will provide improvements in video AF speed and accuracy as well as subject detection performance. It is scheduled for release before the end of the year.