I regularly shoot soccer with a 1DX + Sigma 120-300 f2.8 sport lens tethered to my laptop to allow me to edit, caption and ftp images fairly quickly after the action has taken place. Been using this system successfully for a number of years now with EOS Utility and Photo Mechanic.
I've been considering whether its possible to tether a second camera with a 500mm lens for the longer range shots. Both cameras would be connected, but only one would be active at any point in time (unless I can manage to shoot with both left and right hands at one time)
I don't think EOS Utility allows multi camera connections, but I recall some mention of a software package a few years back which apparently could process images from 2 cameras connected via USB cables to a laptop.
Anyone know if its possible and if so what software is needed?