EOS 7D Mark II Firmware 1.1.1 Issue

18th May 2017

Thank you for using Canon products.

A communication error has been discovered when using the EOS 7D Mark II running Firmware Version 1.1.1, which version was released on April 27, 2017, in combination with the Wi-Fi Adapter W-E1.

We sincerely apologise for any inconvenience caused to customers, and we ask for your ongoing patience.


Remote shooting with the Camera Connect App is not possible after connecting the EOS 7D Mark II to a smartphone via the Wi-Fi Adapter W-E1.

Affected Product

EOS 7D Mark II Digital SLR Camera

Units that have been updated from Firmware Version 1.0.5 or earlier to Firmware Version 1.1.1  

This phenomenon will not occur if the camera meets either of the two conditions below:

  • If the camera has been updated from Firmware Version 1.1.0 to Firmware Version 1.1.1.
  • If the camera was already equipped with Firmware Version 1.1.1 at the time of purchase.

Market Support

We are currently making preparations to correct this phenomenon with the release of a firmware update in early June.

In the meantime, the tentative countermeasure is as follows.

Firmware Version 1.1.1 will no longer be available for download, and Firmware Version 1.1.0 will be made available for download again.

Users whose camera is affected by this phenomenon are asked to download Firmware Version 1.1.0 and install Firmware Version 1.1.0 onto the camera.

If you want the improvements and fixes provided in Firmware Version 1.1.1* applied to your camera, please contact the Canon Customer Support Center in your region and make a request for your camera to be re-updated to Firmware Version 1.1.1.

*Improvements and fixes provided in Firmware Version 1.1.1:

  1. Enhances reliability of communications when transferring images using Wireless File Transmitter WFT-E7A.
  2. Corrects the phenomenon of Err70 which occurs with certain combinations of settings.
  3. Corrects the very rare phenomenon in which the shutter can no longer be released.
  4. Enhances reliability of operations for specific custom function settings.
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