This Baseplate for the C100/200/300/500, A7 series, It attaches to the camera with 3/8"-16 and 1/4"-20 screws. The Baseplate features 15mm diameter, 60mm spaced rod holes in the front of the base plate that allow users to mount a follow focus, lens support or other accessories in front of the camera.
It features a pair of 15mm rods that are 7.9"(20cm) long through the length of the baseplate.