Canon dropped the ball on these cameras. IQ is at best average, certainly not at the level of an entry level, $450 m4/3 camera.
Disappointing!

United Kingdom, Republic of Ireland, 5 April 2018 – Canon UK today announced a firmware upgrade for its professional EOS C200, EOS C300 Mark II, XF405, XF400, EOS C700 and EOS C700 GS PL cameras. Major updates include the addition of XF-AVC (MXF) – a Canon video format – for the XF405, XF400 and C200. XF-AVC (MXF) offers increased efficiency for recording high-quality UHD and HD footage, while improving production workflows.

The firmware upgrade will be available from the Canon Support site from April 5th.

New firmwares

• https://www.usa.canon.com/internet/portal/us/home/support/details/camcorders/professional/xf400?subtab=downloads-firmware
• https://www.usa.canon.com/internet/portal/us/home/support/details/camcorders/professional/xf405?subtab=downloads-firmware

Canon XF405/XF400 Firmware v1.0.5.0

1. Adds [Custom Picture] modes that enables detailed image settings.
2. Adds [EOS Standard] and [Production Camera] color matrix to [Custom Picture] parameter.
3. Expand assignable features to assign buttons.
4. Improves autofocus accuracy when zooming.
5. Improves image quality when using the [Digital Zoom] [Advanced 30X] mode.

Download firmware v1.0.5.0 for XF405 and  XF400