Product Advisories

Thank you for using Canon products.

Affected Product
Canon EOS-1D X Digital SLR Camera 

Firmware
Firmware Version 1.2.1 incorporates the following improvements and fixes.

1. The function to disable the Image size selection button has been added.
    * Please see the instruction manual "EOS-1D X Firmware Version 1.2.x Additional Function" (PDF file) included in the downloaded firmware
    1.2.1 folder for information on how to intentionally disable this button, after the firmware update 1.2.1 has been installed in the camera.
2. Fixes a phenomenon in which Err 70 and Err 80 may occur during certain shooting conditions.

Firmware Version 1.2.1 is for cameras with firmware up to Version 1.1.1. If the camera's firmware is already Version 1.2.1, it is not necessary to update the firmware.
The firmware update takes approximately seven minutes.

Before downloading the firmware update for your camera, please review the instructions thoroughly.

Support

The new Firmware Version 1.2.1 can be downloaded by clicking here.

This information is for residents of the United States and Puerto Rico only. If you do not reside in the USA or Puerto Rico, please contact the Canon Customer Support Center in your region.

Please register the EOS-1D X. By registering, we will be able to notify you via email when service updates are available.

Thank you,
Customer Support Operations
Canon U.S.A., Inc