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Firmware Version 1.2.1 incorporates the following fix:
1. Corrects a PTP communications vulnerability.
2. Corrects a vulnerability related to firmware update.
Firmware Version 1.2.1 is for cameras with firmware Version 1.2.0. If the camera's firmware is already Version 1.2.1, it is not necessary to update the firmware.
When updating the firmware of the camera, please review the instructions thoroughly before you download the firmware.
Note:
(1) Once the EOS 5D Mark IV is updated to Version 1.1.0 (or later), it cannot be restored to a previous firmware version (Version 1.0.1 to 1.0.4).
(2) Cameras running Firmware Version 1.1.0 are cameras that have received the charged upgrade service to support Canon log at a Canon service center. Canon Log support will not be affected on cameras running Firmware Version 1.1.0 that are updated to Firmware Version 1.1.2 being released this time. For cameras running Firmware Version 1.0.4 or earlier, even if the firmware is updated to Version 1.1.2, Canon Log will not be supported. Users who wish to have their camera support Canon Log are asked to make a request for the charged upgrade service at a Canon service center.
(3) When using Version 4.7.10 (or earlier) of Digital Photo Professional to edit JPEG/RAW images captured with a camera updated to Firmware Version 1.1.2 (or later), some of the Exif data may be deleted. In addition, chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer cannot be used when processing RAW images captured using a TS-E lens (TS-E17mm F4L, TS-E24mm F3.5L II, TS-E50mm F2.8L Macro, TS-E90mm F2.8L Macro, or TS-E135mm F4L Macro). Please be sure to update Digital Photo Professional to Version 4.7.20 (or later) before performing image processing.
Q&A:
Preparations for a firmware update:
Windows
After the downloaded compressed file (.zip) is extracted, a firmware folder is created.
*Extracting the downloaded file:
Right-click the zip file, and then select Extract All to extract the file.
The extracted folder contains the firmware (File name: 5D400121.FIR, File size: 31,715,168 bytes) and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish, and Simplified Chinese).
Before starting the firmware update operations, please confirm the contents of the download, and carefully read through the firmware update procedures.
Macintosh
After the downloaded compressed file (.dmg file) is extracted, a firmware folder is created.
*Extracting the downloaded file:
The downloaded folder is automatically extracted, and a firmware folder is created. If the download folder cannot be automatically extracted, double-click the folder.
The extracted folder contains the firmware (File name: 5D400121.FIR, File size: 31,715,168 bytes) and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish, and Simplified Chinese).
Before starting the firmware update operations, please confirm the contents of the download, and carefully read through the firmware update procedures.
(The following is the history of past firmware updates)
Changes in Version 1.1.2:
1. Support has been added for chromatic aberration correction, peripheral illumination correction, distortion correction, and Digital Lens Optimizer when using Digital Photo Professional to process RAW images captured with the following TS-E lenses: TS-E 17mm f/4L, TS-E 24mm f/3.5L II, TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
2. Fixes a phenomenon in which standard exposure may not be obtained, or an irregular exposure may result, when Silent LV (Live View) shooting with the following TS-E lenses: TS-E 50mm f/2.8L MACRO, TS-E 90mm f/2.8L MACRO, or TS-E 135mm f/4L MACRO.
3. Support for Exif 2.31 has been added.
4. Fixes a phenomenon in which the camera may not function normally when using the Camera Connect application to shoot a high frame rate movie.
5. Fixes a phenomenon in which error 80 may occur when HDR movies are shot using the Remote Live View Shooting function. (Applies only to Canon Log-supported cameras.)
Changes in Version 1.0.4:
1. Fixes a phenomenon in which a red-colored area may appear at the bottom-center of a captured image when shooting in bulb mode or during a long exposure.
2. Fixes a phenomenon in which the autofocus may not respond when the autofocus is initiated via pressing the shutter button, the AF-ON button or the AE lock button when configured in the custom control menu.
3. Enhances the reliability of communications between the camera and SD card.
4. Fixes incorrect wording on the Finnish language menu screen.
Changes in Version 1.0.3:
1. Corrects a phenomenon in which the color of images varies depending on the metering mode selected during flash shooting.
2. Improves the reliability of communication when using the EF1.4X III or EF2X III extender.
3. Corrects the level display when the camera is held in the vertical orientation with the hand grip pointing downward.
4. Improves the reliability of communication via USB cable when using the Lens Data Registration function with EOS Utility 3.
Changes in Version 1.0.2:
1. Improves communication reliability when using EOS Utility to register/update* new Digital Lens Optimizer.
Note: *Confirm that the camera firmware is Version 1.0.2 (or later).
Firmware link:
https://www.canon.com.au/cameras/eos-5d-mark-iv/support?option=drivers
