Canon EOS 5D Mark III Camera Firmware 1.3.6

Changes:

1. Corrects a PTP communications vulnerability.
2. Corrects a vulnerability related to firmware update.

Firmware Update Procedure:

- Download the zipped file
- Extract the downloaded file, and create the firmware update file.
- Insert a CF card (or SD card) that has been formatted in the Camera into the card reader.
- Copy the firmware update file to the first window that appears when the CF card (or SD card) is opened (the root directory).
- If the firmware update file is placed in subfolder of the CF card (or SD card), the camera will not see it.
- Remove the CF card (or SD card) from the card reader.
- Insert the CF card (or SD card) with the firmware into the camera.
- Turn the Power Switch <ON>, and then press the <MENU> button to display the menu.
- Rotate the Main Dial and the Quick Control Dial to select the "Firmware Ver.x.x.x" item at the bottom of the “Set-up 5 (Yellow)”, and then press the <SET> button.
- The firmware update screen will appear.
- Turn the Quick Control Dial, select [OK], and then press the <SET> button.
- The screen will appear on the camera's LCD monitor.
- If you press the <SET> button, a confirmation screen will appear, so check the firmware update shown, rotate the Quick Control Dial to select [OK], and press the <SET> button again to start the firmware update.
- The message will appear during the update.
- The firmware update takes approximately 4 minutes.
- When the update is completed, the message will appear on the camera's LCD monitor.
- Complete the firmware update by pressing the <SET> button.
- The firmware update is now completed.
- When the firmware update operations are finished, turn the camera <OFF> and remove battery from the camera for at least two seconds. This will cause the new firmware to take effect after the battery has been reloaded and the camera is turned on.
- Format the CF card (or SD card) before using it again.

Verifying the firmware Version:

- Turn the Power Switch <ON>, and press the <MENU> button.
- Rotate the Main Dial and the Quick Control Dial, and you will see the "Firmware Ver.X.X.X" at the end of the settings shown in “Set-up 5 (Yellow)”.
- This is the currently installed firmware version number.

Precaution:

- A power failure during the firmware writing operation may disable the camera.
- Use a fully charged Battery Pack or dedicated AC Adapter Kit (Optional) for the firmware update.
- Do not shut off the power during the firmware writing operation.
- Do not press any camera buttons during the firmware writing operation.
- Do not open the card slot cover during the firmware writing operation.
- Before the firmware update, please remove the lens, external Speedlite, and all other accessories from the camera. 

About Digital Camera Updates:

Updating to a newer firmware version than the one already installed on your camera can improve the device's overall performance and stability, resolve various issues, and add support for newly developed features or enhance existing ones.

On the other hand, downgrading the camera's firmware can recover its functionality in the unlikely event the currently installed version is faulty or the device's performance dropped after an upgrade. However, bear in mind that applying an earlier build might not always be possible.

It is recommended that changing the camera's firmware be performed when the new release resolves an issue that your device has been encountering, or adds a new feature (or enhances an existing one) that could prove useful for you.

This process isn't intended to be destructive, but still, it's best to save all your personal data and configurations before applying a different firmware. Moreover, make sure that the battery is fully charged and don't use the camera's buttons while the installation is in progress.

When it comes to the update method, usually, you must copy the firmware file onto a compatible memory card, insert it into the camera, and browse from the menu to the device's update section.

However, each device has various ways to enter the update mode and particular steps that should be taken for a successful upgrade, therefore make sure you read the product's installation guide.

That being said, if you consider that this firmware improves your device in any way, then hit the download button and get the desired version; if not, check with our website as often as possible so that you don't miss the update that will boost your camera's performance.