D Focus Systems 515 Cage for Panasonic GH4/GH3 (Black) Compact, form fitting design. Made specifically to fit the Panasonic GH3 or GH4 like a glove Full access to all of the camera's controls, buttons, battery and memory card door 50 1/4-20" threaded holes and 8 3/8-16" threaded holes on the top and sides of the cage HDMI Cable clamp included 100% CNC machined aluminum construction