The 5D Mark III's Light Leak Issue Is Confirmed By Canon

Ruh-roh. The new Canon 5D Mark III might be a fantastic camera and a real champ in low-light situations, but a recently discovered hardware flaw could pose problems for photographers shooting in the dark.

It turns out that in extremely dark conditions the backlight on the 5D Mark III's top LCD display panel leaks light into the camera's body, reaching the AE sensor and throwing off the camera's auto-exposure settings. The problem has been demonstrated in numerous online videos, and as a result Canon has issued an official product advisory on its site.

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 issue shouldn't affect everyone who's dropped $US3500 on a 5D Mark III. It's negligible in well-lit conditions, and is really only a problem when the LCD display's backlight is turned on. But we're curious how Canon plans to resolve this problem since it's not something a simple firmware update can fix. [Canon via PetaPixel]



    I don't have a 5d/3, but is the LCD used during pre-exposure?
    Why not turn it off 50ms before the auto exposure measurement is started, and turn it back on (if active) 20ms after...
    So you see a flicker in the LCD - who cares until a permanent solution comes up?

    Canon are good, they will fix all the ones that are out there as well.

    I was an early adopter of the 24-105L and I had one from the early shipments that had the lens flare phenomenon, as soon as the problem was officially confirmed, bang straight swap, fixed. What was even cooler was I accidentally scratched the outer casing, which was eating me inside (Yes I most likely have OCD).

    I've heard that this only happens when you have the body cap on and no lens attached. If this is the case, what's the real problem?

    Also, who ever actually has the light on when they are composing/shooting? work flow is, if you even need to look at the lcd, press light button, make adjustments (which are typically not exposure settings, more likely iso or something), turn light off, look through viewfinder, compose, set exposure, shoot.

    Sure, its a little disappointing that there is ANY flaw with the camera, but this isnt exactly a deal breaker, is it?

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