Canon’s Brilliant Solution to the 5D Mark III Light Leak Issue: Black Tape
Canon has received some pretty bad publicity over the past month due to the 5D Mark III’s …
Canon Puts 5D Mark III Shipments on Hold As It Investigates Light Leak Issue
Canon has begun informing retailers in the UK and …
Canon Confirms “Light Leak” Issue in the 5D Mark III
Earlier this month, reports started emerging that Canon's new 5D Mark III DSLR has a "light leak" issue. Photographers found that turning on the LCD backlight in a dark room directly affects the camera's metering system (as seen in the video above). Canon published a product advisory today acknowledging the issue, saying,
In extremely dark environments, if the LCD panel illuminates, the displayed exposure value may change as a result of the AE sensor’s detection of light from the LCD panel.
The phenomenon [...] has been confirmed when using the Canon EOS 5D Mark III Digital SLR Camera. Canon is now examining the countermeasures and once the countermeasures are decided, we will post the information on our Web site.
Problem is, the issue isn't limited to the LCD's backlight in a dark room. Apparently any light (e.g. sunlight) shining onto the LCD screen can affect exposure.