The Sony F5/F55 Baseplate is designed specifically to accommodate the rod to lens height on these cameras. The fixed height of the baseplate puts the included 12" rods at the correct height to mount a follow focus and matte box. The baseplate attaches to your camera with a 1/4 20 and 3/8 16 screw and has a standard tripod mounting 1/4 20 and 3/8 16 screw holes underneath.
The 12" rods are threaded and can accept extensions. Use the quick release ratcheting levers at the sides of the baseplate to slide the rods backwards or forwards to accommodate different size lenses.