Thank you for using Canon products.
This firmware update (Version 22.214.171.124 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 126.96.36.199.00 or later.
Firmware Version 188.8.131.52.00 is only for EOS C300 cameras which have Firmware Version 184.108.40.206.00 - 220.127.116.11.00 with the Dual Pixel CMOS AF Feature Upgrade applied. If your camera’s firmware is already version 18.104.22.168.00, 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.
If the EOS C300 camera does not have Dual Pixel CMOS AF Feature Upgrade applied, please download Firmware Version 22.214.171.124.00.