Canon recently announced the firmware update for the Canon R5C. The update includes many features users requested to help the already good Canon R5C become an even better camera for video shooters. In my ongoing review of the Canon R5C, the new firmware seems to address many complaints. 

Canon Firmware 1.0.4.1 Main Updates: 

• Enables left/right switching with one touch when using Magnify. (When recording 8K RAW with VR lens attached.)
• Enables magnification during 8K MP4 recording. (Not available when HDMI 4K is output.)
• Improves switching time between Video/Photo mode.
• Adds Power Saving Mode.
• Enhances Clear Scan resolution.
• Adds Digital-Teleconverter function. (1.5x /2x /2.5x /3x)
• Enables to change WFM size.
• Enables to change Vector scope gain by touch.
• Enables to change WFM/Vector scope opacity.
• Adds [Subject Selection] assignable function via control ring/dial.
• Adds [Canon 709 / BT.709] to the Gamma/Color Space in the Custom Picture setting.
• Adds [CMT 709] in Proxy Rec Color Conversion.
• Adds [CMT 709] in View Assist.
• Adds [G Gain] in White Balance in Custom Picture settings.
• Adds support for 4CH display in audio meter.

Firmware 1.0.4.1 includes a handful of autofocus improvements and performance updates.

• Enables tracking frame to change variably depending on the subject.
• Enables detection of heads facing sideways, backward, or in situations such as when wearing a helmet.
• Enables to select Face via control ring/dial.

The following features are enabled when the lenses are attached: CN-E14-35mm T1.7 L S, CN-E20-50mm T2.4 L F, CN-E45-135mm T2.4 L F, CN8×15 IAS S/E1.

• Displaying metadata, such as the model name and the focal distance of the lens attached.
• Displaying T number.
• Support for Peripheral Illumination Correction and Chromatic Lens Aberration Correction.
• Support for Dual Pixel CMOS AF autofocus（CN8×15 IAS S/E1 only）Support for [Dual Pixel Focus Guide].

The following features are enabled when the following lenses are attached: RF-S18-45mm F4.5-6.3 IS STM, RF-S18-150mm F3.5-6.3 IS STM:

• Adds a menu to switch lens functions. (Focus Ring, Control Ring, Lens Optical Image Stabilization)

The new firmware adds EF lenses compatible with EF-EOS R 0.71x Mount Adapter.

• CN-E14mm T3.1 L F
• CN-E20mm T1.5 L F
• CN-E24mm T1.5 L F
• CN-E35mm T1.5 L F
• CN-E50mm T1.3 L F
• CN-E85mm T1.3 L F
• CN-E135mm T2.2 L F
• EF14mm f/2.8LⅡUSM
• EF24mm f/1.4LⅡUSM
• EF35mm f/1.4LⅡUSM
• EF50mm f/1.2L USM
• EF85mm f/1.2LⅡUSM
• EF135mm f/2L USM

Canon 1.0.4.1 Firmware Update Cautions

• Please use an SD/SDHC/SDXC memory card that is 512MB or greater to perform the firmware update.
• Firmware version 1.0.4.1 is for updating EOS R5 C cameras running firmware version 1.0.0.1 – 1.0.3.1. If your camera’s firmware is already version 1.0.4.1, it is unnecessary 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.
• Firmware update must be performed in VIDEO mode.