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Firmware Updates For 5D Mark III and EOS-1D C Now Available, EOS-1D X Coming Soon

It’s a day full of updates on updates! Canon has just released a couple of firmware updates for two of their cameras, the 5D Mark III and the EOS-1D X, with the update for the EOS-1D C announced for January 5d mark iii (1)

The 5D Mark III update includes:

  • Fixes a phenomenon in which the flash may not fire depending on the timing of when the shutter button is pressed.
  • Fixes a phenomenon in which the AF microadjustment value may change.*
  • Fixes a phenomenon in which the LCD monitor may show a line of false color along boundaries of high contrast.
  • Fixes a phenomenon in which the histogram of a LiveView image is incorrectly displayed when an HDMI cable is connected.
  • Enables the brightness of the camera’s LCD monitor to be adjusted even when an HDMI cable is connected.

* The phenomenon listed in 2 was addressed with Firmware Version 1.2.1, and has been further improved with Firmware Version 1.2.3.
Firmware Version 1.2.3 is for cameras with firmware up to Version 1.2.1. If the camera’s firmware is already Version 1.2.3, it is not necessary to update the firmware.
You can download the 5D Mark III firmware directly from Canon at


The updates for the EOS-1D X come with “improved operability” for the camera, including:

  • AF Performance with Moving Subjects
  • Enhanced AI Servo AF Performance in Low Light Conditions
  • Improved Acceleration/Deceleration Tracking Parameters
  • Selection of Initial AF Point While Shooting in 61-Point Auto Selection AF
  • AF Point Switching According to Camera Orientation
  • Expanded Minimum Shutter Speed in Auto ISO
  • Exposure Compensation in Auto ISO with Manual Mode Set
  • Toggling Between Alternate Camera Settings
  • Same Exposure for New Aperture in Manual Mode
  • Display Protected Images Only

The 1D X firmware is slated for a January 2014 release. You can find out more information at


The list of updates for the EOS-1D C is considerably smaller:

  • EF Lens Communication
  • Enhanced Audio Recording

This firmware is actually part of free service upgrade Canon is offering, requiring your 1D C to be sent in to a Canon Factory Service Center. You can find more information on that here:

Written by Jake Fruia

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