Firmware Version 1.0.4 includes the following fixes:
1. Fixes the rare issue of an error occurring during the transmission of images via Wireless LAN (FTP).
2. The reliability of USB data transfer has been improved between the Canon EOS 5D Mark III running firmware version 1.2.1 and the Canon Wireless File Transmitter WFT-E7A running firmware 1.0.4. For optimal performance be sure to update both devices to the latest firmware version.
Firmware Version 1.0.4 is for Wireless File Transmitters with firmware version 1.0.2. If the Wireless File Transmitter’s firmware is already version 1.0.4, it is not necessary to update the firmware. When updating your Wireless Transmitter’s firmware, please review the instructions thoroughly before you update the firmware.
The new Firmware Version 1.0.4 can be downloaded by clicking here.