As you already know, the new Sony A7s is an absolute beast when it comes to shooting in low light.
The awesome ISO performance turns out to be incredibly handy for video, since where we're basically restricted to a 1/50th of a second shutter speed in order to obtain natural motion.
In my case, it's also turned out to be super-handy photography camera, particularly for night-time situations where you can't carry a tripod on you; or better yet, there's no floor to set a tripod on.
In my latest urban exploration sessions I was able to do a lot of handheld work that I just couldn't pull off with the ol' 5D Mark 3 without getting a very grainy image.
Here are a few shots from these sessions, along with some standard tripod shots, all on the A7S.
For more, check out my instagram: http://instagram.com/giuliocalisse