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Canon issued a new product advisory regarding the EOS 5D Mark III and the infamous light-leaking issue. It looks as if Canon has identified the 5D Mark III batches that are affected by the issue: Products whose sixth digit in the serial number is 1 or 2 (e.g. xxxxx1xxxxxx or xxxxx2xxxxxx, where x represents any optional number). Canon will provide a free inspection of you camera if you are worried about the light-leaking issue. Moreover, a firmware update for the 5D Mark III has been released (rel. 1.1.2, click on “software and drivers”, then select your operating system, then click on “firmware” to download). The firmware update fixes the following issues: 1. Supports a new accessory, GPS receiver GP-E2. 2. Fixes a phenomenon where a pink cast may develop over the image when the shutter is completely pressed with the camera’s power turned off (by the auto power off setting). 3. Fixes a phenomenon where the camera operation stops after one shot when shooting in High Dynamic Range (HDR) mode. 4. Fixes a phenomenon where the Shooting Date/Time in the EXIF data of the image shows a later time than the actual shooting time. 5. Fixes the time zone for the Samoa Islands. 6. Corrects errors in the Finnish menu screen. (Products for the Japanese market do not display the Finnish menu.)
The full text of the light-leak product advisory:
To Users of the Canon EOS 5D Mark III Digital SLR Camera
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.
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 EOS 5D Mark III Digital SLR Camera
*Products whose sixth digit in the serial number is 1 or 2 are affected.
For example, “xxxxx1xxxxxx” or “xxxxx2xxxxxx” ([x] represents any optional number.)
Under almost all shooting conditions (including dark environments) this phenomenon will not affect your captured images. However, if you would like Canon to inspect your camera, we will provide this service free of charge upon request beginning in mid-May. Please contact Canon using the information below to request service.