External monitoring on the 5D mk III - how?

[legreve]

So it's been a couple of months since I last tried.

I have the Cineroid EVF 4rvw, and it's a nice monitor, but when I pass the signal from the 5D mk III it gets messed up somehow, and doesn't take up the entire monitor.

Have any of you figured out how to get a proper image via hdmi out?

Again, this is the 5D mk III...

Thanks

[Midphase]

I tested a DP5 with mine and it seemed to work ok, a bit of a delay getting the signal (I think that's an HDMI issue), and the crop marks were off center. Aside from  that, the image was quite useable and what I expected it to be.