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Canon Issues EOS 1D X f/8 Autofocus Service Notice

From Canon USA:
 
It has been confirmed that auto-focusing may not function at f/8 aperture on some Canon EOS-1D X Digital SLR Cameras with firmware Ver. 1.1.1. We offer our most sincere apologies to customers using this product who have been inconvenienced by this issue. The support measures for this phenomenon are described below.
 
Phenomenon
 
Firmware Ver. 1.1.1 enabled the center AF point to autofocus when the camera is used with lens/extender combinations whose combined maximum aperture is f/8. On some of the cameras with firmware Ver. 1.1.1, auto-focusing does not function at f/8 aperture. *This phenomenon does not occur with a camera which firmware has been updated by a user, or by Canon service center.
 
Affected Product
 
Canon EOS-1D X Digital SLR Cameras with the sixth digit from the left in the body number (serial number) is 4 or 5 are affected.
 
Example: Body No. xxxxx4xxxxxx or xxxxx5xxxxxx ([x] represents any optional number.)
 
Canon EOS 1D X Service Notice Serial Numbers
 
*Even if the sixth digit from the left in the body number (serial number) is 4 or 5, the following cameras are not affected units.
 
Canon EOS 1D X Service Notice White Dot
 
<There is a white dot in the battery compartment.>
 
Support
 
Overwriting the firmware activates auto-focusing at f/8 aperture. To accomplish this, please download the firmware Ver. 1.1.1 available for download from Canon Web site, and overwrite the firmware of the camera.
 
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.
 
Please register the EOS-1DX. By registering, we will be able to notify you via email when service updates are available.
 
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: 1-866-251-3752
Email: carecenter@cits.canon.com
For additional support options: www.usa.canon.com/support
Posted: 12/3/2012 8:41:10 PM CT   Posted By: Bryan
Posted to: Canon News
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