5D3 light leak, Canon's response to my query.

Started Apr 16, 2012 | Discussions thread
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tlinn Contributing Member • Posts: 525
Re: Light Leak and You

Doug MacMillan wrote:

I've garnered to following information from various sources, including Canon's release:

It happens under extremely low light situations.
It can affect the exposure by as much as 1/3 stop.
It is possible to turn the top LCD off. Doing so eliminates the problem.
Is the above an accurate summation?

No. Most of the examples I have seen (lens: ON; lens cap: OFF; eyepiece cover: ON) have been 2/3 of a stop. And it isn't limited to the LCD light. Ambient light also affects the metering in situations where the light hitting the camera is much brighter than the scene being metered.

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