Hello I use a Canon EOS Rebel T3 and its low on the list of live view cameras for Dragonframe , The Video is only 720p (I don't use it for video / I got it for Stopmotion) My Cameras top res is 4272x2848 RAW that is better then 4K (3840x 2160) and I don't film above that anyway. I do have a full mirror on the camera and they say it will make the camera vibrate as it moves and this can cause problems in stop motion rigs. You need good solid camera mounts and rigging to limit this. Other then that, this is all I needed. It costs 350$ new and if I wear it out I can buy 3 of them for the price of just one 60D.
I don't have a over heating issue with my camera but I do with my steppers on the camera rig.
18-55 stock lens I plan on adding a full frame Manuel macro lens, one that I can lock down the aperture and just use steppers to control focus, zoom and aperture from Dragon Frame. directly .