Thank you for using Canon products.
Firmware Version 126.96.36.199 incorporates the following enhancements:
1. The following features are enabled when these lenses are attached: CN-E20-50mm T2.4 L F, CN-E20-50mm T2.4 L FP
• Displaying metadata, such as the model name and the focal distance of the lens attached.
• Displaying T number
• Support for peripheral illumination Correction（EF only)
• Support for [Dual Pixel Focus Guide] (EF only)
2. Adds file name to SDI Ancillary data on the video output signal.
• Please use an SD/SDHC/SDXC memory card that is 512MB or greater to perform the firmware update.
• Firmware version 188.8.131.52 is for updating EOS C300 Mark III cameras running firmware version 184.108.40.206 -220.127.116.11. If your camera's firmware is already version 18.104.22.168, it is not necessary to update the firmware. Once the camera is updated to the latest version, it cannot be restored to a previous version.
• Please refrain from loading menu settings generated using the most recent firmware version to a product running an old firmware version, as doing so may affect camera operations.
Preparations for a firmware update:
After the firmware update has been performed, the camera's menu settings will be reset. It is recommended that, prior to starting update operations, users save their menu settings as settings data to an SD card, separate from the one that will be used to carry out the update. This saved data can be loaded into the camera and the settings can be changed after the update has been completed. For further information on this, please refer to the section in the unit's Instruction Manual titled "Saving and Loading Camera Settings".
The downloaded folder contains the firmware (file name: VQA7.FIR / file size: 84,136,880 byte), and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish and Simplified Chinese). Prior to starting the firmware update operations, please be sure to carefully review and confirm your understanding of these instructions.
The following items are required to perform this firmware update:
1. Camera Body EOS C300 Mark III
2. A computer (OS requirements: Windows 10、Windows 8.1、Windows 8、Windows 7 SP1、Mac OS X 11.0 - 11.2)
3. SD/SDHC/SDXC memory card with a capacity of 512MB or more (commercially available)
4. An SD card reader/writer (commercially available) or an SD card slot built into the computer
5. A fully charged battery pack for the camera
6. Compact power adapter bundled with the camera
7. The firmware (the downloaded file from Canon website. See link below)