I was sitting here squinting at some of the lower resolution photos of the Canon 5D Mark III looking to see what that top port was on the left side and someone emailed me a link to a high-res crop.
Turns out that my suspicion was right. This was a big question and a big “duh” on the 1D X. Those leaked pics reveal that the 5D Mark III has a headphone out, which is almost certainly for monitoring in-camera audio.
Now, let’s just hope we have proper metering and control over audio levels during recording…
[via CRF - Thanks D.]