I have both the cameras today on loan from my local dealer.
I use to own the ursa, but sold it thinking I would get the ursa pro, but then the c200 got released. I know the c200 eats the ursa in AF, ISO and stripped down weight, but the ursa is quite a bit workflow and shoulder mount friendly...
hi, I have a metabones adaptor I have used with my a7r, then my a7s and now I am using an a7rmk2 with it. It works really well but often doesn't get seen by the camera.
My solution is to take the lens adaptor off camera and then put it back on then it solves it till next time.
But i am...