Fotasy HR-DV Ergo Handle Pistol Grip for SONY camcorders w/ A/V R or LANC, Blackmagic Cinema camera The pistol grip features finger grooves for ergonomic operation. 1/4"-20 stud on its top surface, for sturdy attachment to the camcorder. 1/4"-20 thread at the bottom of the handle, which allows you attach your mounted camcorder to a tripod or head. ACC socket for shutter cable connect to remote socket of camera body to control the camera; "LOCK button" is used to lock the camera shutter for long exposures or continuous. The start/stop button allows you remotely control the video recording without touch the camcorder. The unique LOCK button will safely lock the start/stop button to prevent unwanted start/stop button pressing. The unique LOCK button will safely lock the start/stop button to prevent unwanted start/stop button pressing.