Thank you for using Canon products.
This firmware update (Version 126.96.36.199 00) incorporates the following improvements:
2. Supports WFT-E8.
3. Supports peripheral illumination correction when the EF24-105mm F4L IS Ⅱ USM is attached.
*1 The firmware of the lenses also need to be updated.
*2 For CN7×17 KAS S/E1, support has already been provided in Version 188.8.131.52.00 or later.
Firmware Version 184.108.40.206.00 is only for EOS C300 cameras without the Dual Pixel CMOS AF Feature Upgrade. If the EOS C300 camera has had the Dual Pixel CMOS AF Feature Upgrade applied, please download Firmware Version 220.127.116.11.00.
Firmware Version 18.104.22.168.00 is for Cinema EOS C300 or EOS C300 PL cameras with Firmware Version 22.214.171.124.00 – 126.96.36.199.00. If your camera’s firmware is already version 188.8.131.52.00, it is not necessary to update the firmware. Once the camera is updated to the latest firmware version, it cannot be restored to a previous version.