Thank you for using Canon products.
Canon has released a firmware update for the EOS-1D Mark IV.
EOS 1D Mark IV
Firmware Version 1.1.1 incorporates the following change.
1. Optimizes the camera’s exposure accuracy when using EF 24mm f/2.8 IS USM and EF 28mm f/2.8 IS USM lenses, which are scheduled for release in June 2012. If these lenses are used with an EOS-1D Mark IV camera that has not been updated with the new firmware, the image may be overexposed depending on the subject and shooting scene.
Firmware Version 1.1.1 is for cameras with Firmware Version 1.1.0. If the
camera's firmware is already Version 1.1.1, it is not necessary to update the
Cameras with Firmware Version 1.1.1 cannot be restored to a previous Firmware Version (such as Version 1.1.0 or earlier).
The new Firmware Version 1.1.1 can
be downloaded by
NOTE: Once on the "Drivers & Software" tab please choose operating system and version. Then expand the Firmware section and click on the firmware file name to access the details page. Choose "I Agree - Begin Download" button to start the download.
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 your EOS 1D Mark IV. By registering, we will be able to notify you via email when future firmware updates become available for download. If you already registered, please ensure you are opted-in to receive the notification.
Customer Support Operations
Canon U.S.A., Inc
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