Archive for: f/8

Service Advisory: Canon EOS-1D X f/8 Autofocus Issue, Download Firmware Fix

Service Advisory: Canon EOS-1D X f/8 Autofocus Issue, Download Firmware Fix

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

*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.

*Look for 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.

Source: [TDP]

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The EOS-1D X & f/8

The EOS-1D X & f/8

Clarification
Arthur Morris has posted the reply he received from Chuck Westfall in regards to the f/8 issue with new Canon EOS-1D X.

“AF is unavailable on the EOS-1D X if the maximum aperture reported to the camera through the electronic lens mount is smaller than f/5.6. This is a lower specification than previous EOS-1 series DSLRs. On the plus side, consider the fact that with most f/4 lenses including the 400 DO, 500/4L IS and IS II, and 600/4L IS and IS II, you now have 41 cross-type AF points plus color and face detection, whereas you had no cross-type points and no color or face detection during AF with previous EOS-1 series DSLRs using the same lenses, not to mention a significantly wider AF coverage area from left to right.”

via [NL] & [BPN]
 

cr

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