Canon EOS-1Ds Mark III firmware v1.2.3

Details: Firmware Version 1.2.3 for the Canon EOS-1Ds Mark III camera incorporates the following fixes:

1. Resolves the following phenomenon: when the camera is not attached to a lens, power consumption may be higher than usual, causing premature battery drain.
2. Resolves a phenomenon in which "Err 70" may be displayed when the shutter is released without a lens attached. Firmware Version 1.2.3 is for EOS-1Ds Mark III cameras with firmware version 1.2.2 or earlier. If your camera's firmware is already Version 1.2.3, it is not necessary t​o update the firmware. Before updating your camera's firmware, please review the instructions thoroughly. Preparations for the 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: 1DS30123. FIR / file size: 10,533,852 bytes) and instructions on the firmware update procedures (a PDF​ file in two languages: English and Japanese). Before starting the firmware update operations, please confirm the contents of the download, and carefully read through the firmware update procedures. (Revision History) Q: Are the previous versions of firmware included in version 1.2.3? A: Yes, the following improvements from the previous versions are included. Changes in Version 1.2.2 1. Enables the center AF point to autofocus when the camera is used with the EF 200-400mm f/4L IS USM Extender 1.4X lens and an Extender, whose combined maximum aperture is f/8. Changes in Version 1.2.0 1. It has become compatibleEnables compatibility with Wireless File Transmitter WFT-E2 II, which was released in late December, 2009.
• Changes from previous versions (Ver. 1.2.0 or before) are included.