Canon updated the product advisory for the Canon EOS 5D Mark III concerning the LCD illumination exposure issue: In extremely dark environments, if the LCD panel illuminates, the displayed exposure value may change. However, based on the results of extensive testing this change in exposure value will not noticeably affect the captured image.

Canon product advisory:

UPDATE:
Please see the changes to the “Identification Procedure” section below regarding criteria for affected serial numbers. The identification method has been enhanced to include the first digit in the identification procedure in order to more precisely identify affected products.

Thank you for using Canon products.

Concerning the EOS 5D Mark III digital SLR camera, when the LCD panel illuminates in extremely dark environments, the displayed exposure value may change. Canon has concluded the investigation of this phenomenon, and this announcement informs you of our findings as described below.

Phenomenon
In extremely dark environments, if the LCD panel illuminates, the displayed exposure value may change. However, based on the results of extensive testing this change in exposure value will not noticeably affect the captured image.

Affected Product
The phenomenon described above may occur in Canon EOS 5D Mark III Digital SLR Cameras whose first and sixth digits of the serial number are as set forth below.

Identification Procedure:
Serial Number: [XnnnnNnnnnnn] “X”=”0” and “N”=”1” or “2”
“n” represents any digit.
Examples of affected serial numbers are: “0nnnn1nnnnnn” or”0nnnn2nnnnnn”