Okay, we’re oldschool. We use the Canon Mk II. To be fair, this was our first professional camera back in the day. Not to mention, this camera was used to film parts of the Avengers, so that proves its legitimacy, even as a predecessor.
We don’t recommend you get the old model, though.
The Canon 5D Mk III & Canon 5D Mk IV have all kinds of new features that make them even better than ours, like bigger & newer sensors and way more autofocus points, for example.