Firmware Notice: EOS 5D Mark IV: Firmware Version 1.3.3
Firmware Version 1.3.3 incorporates the following fixes and enhancement.
Improves the camera’s connectivity to a PC when using a USB 3.0 or higher compatible cable.
Fixes an issue in which self-timer shooting cannot be performed (for cameras with Firmware Versions 1.3.1 and 1.3.2.)
Fixes an issue in which an electronic beep does not sound when registering an AF frame as the AF start position (for cameras with Firmware Versions 1.3.1 and 1.3.2).
Fixes an issue in which a small sound is generated from the speaker when the power is turned on (for cameras with Firmware Version 1.3.2).
The Version 1.3.3 firmware being released this time is for cameras with firmware up to Version 1.3.2. If the camera's firmware is already Version 1.3.3, it is not necessary to update the firmware. Prior to updating the firmware of your camera, please thoroughly review the instructions before you download the firmware.