According to one of my shoot buddies in a high end film school, all the "cool kids" are migrating from the 5d MKIII to the new Sony A7s MkII with the 5 axis gimbal internal IS.
But then you have drifted off into Sony lens land...which is not always a good thing.
Well.....it depends. Canon and Nikon are the dominant stills camera makers,
so if you are looking to buy or sell lenses, then Canon and Nikon are much
better. More people have those lenses and there is a bigger demand for them
if or when you decide to sell off your lenses. But Sony has a couple things
going for them lenswise. They make power zoom lenses for the Super 35 chip,
which other manufacturers don't do except at a whole new price ballgame.
For example, the Cabrio 19-90 power zoom costs about $38,000. The Canon
17-102 is similarly priced. Sony makes a 18-105 power zoom for $598. And
a 28-135 power zoom lens for $2500. And a 18-200 power zoom for around $800.
So if you are looking to 'replicate' a little of the functionality of a standard 2/3
broadcast camera but on a big sensor camera, Sony lenses actually have a leg
up on everyone else. Now obviously, there are reasons the Sony lenses cost less.
They are not at the level as the Cabrio and Canon. But for 1080p they are just
fine. And they are the only manufacturer making low budget 'cinema' lenses
for motion shooters. Most of these low priced lenses are geared at stills shooters.
Again, though there is less of a market for the Sony lenses so plan accordingly.