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Changes in the Firmware
Firmware Version 1.0.3 incorporates the following fixes and improvements:
EOS-5D Mark IV
Firmware Version 1.0.3 is for cameras with firmware Version 1.0.2 or earlier. If your camera's firmware is already Version 1.0.3, it is not necessary to update the firmware.
When updating the firmware of your camera, please review the instructions thoroughly before you update the firmware.
The firmware update takes approximately 4 minutes.
Preparations for the Firmware Update:
In the folder you downloaded are the firmware (file name: 5D400103.FIR / file size: 31,518,272 bytes), and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish, and Simplified Chinese). Before starting the firmware update operations, please be sure to carefully confirm your understanding of these instructions.
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.