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Wednesday, February 20, 2013

Canon EOS-1D X and EOS-5D Mk III AF Assist Beam Advisory

Canon EOS-1D X cameras

As I have reported in my earlier post, Canon USA has now officially acknowledged the Speedlite AF assist beam issue on EOS-1D X and EOS-5D Mk III cameras.

Affected Products

EOS-1D X DSLR Camera


Depending upon the shooting conditions, it may take slightly longer for the EOS-5D Mk III and EOS-1D X digital SLR cameras to acquire focus when using the Speedlite's AF Assist Beam, compared with that of the EOS-D Mk II and EOS-1D Mk IV digital SLR cameras using the Speedlite's AF Assist Beam.

We are developing a solution to enhance the focusing feature for the EOS-5D Mk III and EOS-1D X and plan to release a firmware update based on following estimated schedule :

EOS-5D Mk III : (estimated) Late April, 2013
EOS-1D X : (estimated) Late May, 2013


This information is for residents of the United States and Puerto Rico only. If you do not reside in the USA or Puerto Rico, please contact the Canon Customer Support Center in your region.

If you have not already done so, please register your Canon EOS 5D Mark III Digital SLR Camera or your Canon EOS-1D X. Digital SLR Camera. By registering, we will be able to notify you via email about future service upgrades.

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

Contact Information for Inquiries
Canon Customer Support Center
Phone : 1-855-246-3367 (toll free)
TDD : 1-866-251-3752
Email :

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