Canon EOS-1D X v1.2.4Firmware Version 1.2.4 incorporates the following functional improvements and fixes:
- Improves the speed of the camera's acquisition of focus when using a Canon Speedlite's AF-assist beam.
- Reduces the time it takes to display the metering result on the LCD or Viewfinder when the meter has been activated.
- Fixes a phenomenon in which a "Caution 02" message is unnecessarily recorded in the camera status log.
- Fixes a phenomenon in which continuous shooting pauses when using a Canon Speedlite.
- Fixes a phenomenon, when the Canon GP-E1 is attached, in which the GPS device settings are reset to default settings when the camera has been powered off.
* This phenomenon occurs only with firmware Version 1.2.1.
* After changing the GPS device settings, please be sure to power off the camera before removing the battery. This will ensure that the camera's GPS device settings will be saved.
Download from Canon website