The C300 Studio Baseplate is made specifically for the EOS C300 camera. It is exceptionally flat which helps keep the center of gravity low. This baseplate features a pair of 15mm rods that are 12” long running through the length of the baseplate. You can quickly reposition the rods for various lens lengths by loosening the 2 levers, one on each side of the baseplate. On each side of the baseplate there is also a set of 15mm lightweight holes. The side holes take 15mm female rods that are locked via an Allen screw. This gives users a virtually unlimited amount of mounting options. With these side holes, you have the option of turning the baseplate into a cage configuration. Another option is to mount a Zwiss Plate with professional batteries off of the side of the baseplate when shooting on a tripod for better balance. When not using a cage configuration, the side holes can be used for an EVF, Zacuto articulating arms, rods and more. The baseplate also has standard ¼” 20 and 3/8” 16 holes on the bottom for mounting the rig onto a tripod. The C300 Studio Baseplate attaches to the camera with 3/8” 16 and ¼” 20 screws*. This Baseplate is perfect for a rig like the C300 Stinger or an advanced tripod rig with rods coming off of the back end for external power, etc.