For everyone concerned about the detail of trying to keep focus on one single point, I'm betting that one point that wasn't made perfectly clear is this: The cameras and the arms they sit on are probably/theoretically/ calibrated very very tightly to one another.
This would allow the movement, adjustment of focus to be automatic for every camera. To be as broad as possible, there'll probably be a guy with a joystick and Pan/Zoom controls that will automatically compensate for these factors in relation to their locations. He/she just needs to point the focus to the spot on the field he wants it to be. The computers will adjust for the rest.
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For everyone concerned about the detail of trying to keep focus on one single point, I'm betting that one point that wasn't made perfectly clear is this: The cameras and the arms they sit on are probably /theoretically/ calibrated very very tightly to one another.
This would allow the movement, adjustment of focus to be automatic for every camera. To be as broad as possible, there'll probably be a guy with a joystick and Pan/Zoom controls that will automatically compensate for these factors in relation to their locations. He/she just needs to point the focus to the spot on the field he wants it to be. The computers will adjust for the rest.