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EOS 5D Mark IV
Changes in firmware:
The firmware (version 1.3.3) incorporates the following fixes:
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. When updating the firmware of your camera, please first go over the instructions thoroughly before you download the firmware.
Should you have any questions about the announcement, please contact the Authorized Service Facility in your area or you may contact the Call Center within your region.