Hi Jaka, thanks so much for your reply. This is very helpful. I am afraid my knowledge about how cameras and lenses work is limited. My overall goals are to 1) get a recording of the whole body, and 2) simultaneously record the face (or upper body) as densely and accurately as possible. My thinking has been that the best way to achieve that would be with two separate cameras. I imagine the face-specific camera would/should be autofocus. if it makes sense to you to have a separate camera dedicate to highest-possible-resolution face recording, is there a particular camera you would recommend?
Also, thanks for the info about the wide-angle lenses not being auto-focus. What kind of workarounds would you recommend for that?
Thanks very much again - john