light leakage reported for 5D MkIII

Started Apr 6, 2012 | Discussions thread
Drew Saur Forum Member • Posts: 97
Re: light leakage reported for 5D MkIII

Interesting, and I can confirm the difference in my Mk III as described.

But the light is not hitting the sensor; rather, it would be hitting the metering system, which is housed alongside the prism (which is why all cameras come with eyepiece covers), and I almost have to imagine that this happens with other cameras as well, and I would presume that there is compensation for this, or that it falls within tolerances.

If I had other cameras with me right now I would try to confirm. I am sure others will as this gets out there.

Drew

cyk wrote:

http://www.slrclub.com/bbs/vx2.php?id=newproduct&page=1&divpage=7&ss=on&select_arrange=headnum&desc=asc&no=37367

About 10 users have confirmed the same problem.
Basically, outside light is reaching the sensor through the top LCD panel area.
The original poster recommends the following test:

Remove lens and place the body cap.
Put on the eye-piece cover.
This should theoretically block any light from entering the camera.
Set ISO to 800 and set shutter mode to Av.
You should see a shutter speed of around 10 sec.

Now either shine a flashlight near the top LCD panel area or simply turn on the backlighting of the top LCD panel.

This will cause the shutter speed to fluctulate between 5-8 seconds, indicating light leakage.

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