Thank you for using Canon products.
This firmware update (Version 188.8.131.52 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 184.108.40.206.00 or later.
Firmware Version 220.127.116.11.00 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 18.104.22.168.00.
Firmware Version 22.214.171.124.00 is for Cinema EOS C300 or EOS C300 PL cameras with Firmware Version 126.96.36.199.00 – 188.8.131.52.00. If your camera’s firmware is already version 184.108.40.206.00, 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.