light leakage reported for 5D MkIII

Started Apr 6, 2012 | Discussions thread
(unknown member) Senior Member • Posts: 1,378
Avoid The Test for light leakage for 5D MkIII as shown

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.

On your test, you did not remove the eye cup and cover the eye piece with black tape after closing the eye piece cover.

Following the above instructions may damage your camera because you have removed your lens that communicates with your camera and the paths that the electronics is expecting to fond will not be present, so strange results can be expected from the electronics, including circuit failure, due to stress and overheating, caused by partially completed circuits.

There is a science to correctly testing things, and it takes lots of practice to become a proficient tester, so my suggestion is to leave testing to a proficient tester.

Walter Sr
--
I am out to take the perfect picture, if it exits!

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