Canon has announced that it will be releasing new firmware for the Canon EOS-1D X in January 2014.
The firmware will include the following improvements and corrections:
Auto focusing performance under low-light conditions has been enhanced when performing focusing before shooting in AI Servo AF mode. The enhancement comes from the improvement in tracking capability for the first image in the low-light conditions.
The number of release parameters settings for the 'AI Servo AF 2nd image priority' AF function will be increased to enable improved AF tracking in low light or maintain consistent high frames rates during continuous shooting.
The number of parameters for acceleration/deceleration tracking in the AF Configuration Tool will be increased.
Exposure compensation can be performed when using manual exposure and ISO Auto.
The minimum shutter speed limit for ISO Auto will be increased with shutter speeds up to 1/8000.
A new function to keep the exposure constant by altering the ISO or shutter speed in manual exposure, when the aperture value changes when zooming or changing lenses will be added.
A new option will be added to orientation linked AF point to enable only the AF point to switch as you change orientation rather than both AF point/ AF area settings
A new option to continue to use the previously manually selected AF point as the initial starting AF point when switching to 61-point automatic selection will be added.
New customization of the Exposure metering and AF controls will be added for more flexibility.
The number of possibilities for controls to switch between one-shot AF and AI Servo AF using custom controls has increased.
A function will be added to allow the playback and review of protected images only.
The update will be for cameras running firmware version 1.2.4 and earlier.
The firmware is set to be released in January 2014. For more information, take a look at the Canon Support page.