https://www.usa.canon.com/internet/p...os-1dxmarkiii/

Future Firmware: EOS-1D X Mark III
Thank you for using Canon products.

We have confirmed that the following phenomenon may occur during use of the EOS-1D X Mark III digital SLR camera. A new firmware release is planned for early April; once the new firmware is ready, we will make an announcement on our website.

We would like to offer our sincere apologies to users of these products who may have been inconvenienced by this issue

Phenomenon
When the camera is used with the electronic level set to “Show” in the viewfinder display, in rare cases, the camera may not perform normally when operating the AF-ON button or shutter button.

Affected Product
EOS-1D X Mark III (Firmware version 1.0.0)

Workaround
Use the “Hide” setting for the “Electronic level” in the “Viewfinder display”.

Setting procedure:
Menu / Set-up 2 tab / Viewfinder display / Electronic level* [Hide]
*Default setting: [Hide]

Support
In early-April 2020, we plan to release a firmware update to address the phenomenon listed above. Once the new firmware is ready, we will make an announcement on the Canon U.S.A website.

In the interim, please follow the steps provided in the workaround.

If you have not already done so, please register the EOS-1D X Mark III. By registering, we will be able to notify you via email about future announcements.

Thank you,Customer Support Operations
Canon U.S.A., Inc

Contact Information for Inquiries
Canon Customer Support Center
Phone: 1-800-OK-CANON
1-800-652-2666
TDD: 1-8855-270-3277
Email: carecenter@cits.canon.com
Support options and hours of operation: www.usa.canon.com/support


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