Canon has made Canon EOS Ra firmware update version 1.8.0 available for
Firmware Version 1.8.0 incorporates the following fixes and enhancements:
- Improves color balance when the RF50mm F1.8 STM lens is attached to the EOS Ra camera.
- Support has been added for the following lenses*:
- RF70-200mm F2.8 L IS USM
- RF100-500mm F4.5-7.1 L IS USM
*With Firmware Version 1.7.0 and later.