This isn’t a biggie as far as camera issues go, but there are a few photographers reporting some strange discoloration on sections of their Canon 5D Mark III that makes the camera look like it’s a lot older and more beat up than it actually is.
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A little earlier today, we reported on how Sohail Mamdani of BorrowLenses had discovered that one particular Nikon D600 he was testing was consistently overexposing photographs by two stops. After searching long and hard for the cause, he stumbled upon the culprit: the D600 wasn’t closing the aperture blades to the correct opening size.
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Official presidential photographers lead exciting lives. President Obama’s photographer Pete Souza attends secret meetings and captures iconic photos. Georgian President Mikheil Saakashvili’s personal photographer was arrested last year after being accused of being a spy for Russia. Now Iranian President Mahmoud Ahmadinejad’s photographer is the latest to do something noteworthy: he defected to the United States.
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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.
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