ST 220:1996 - SMPTE Standard - For Motion-Picture and Television Equipment — Camera Mounting Connections — 1/4-Inch-20 Thread and 3/8-Inch-16 Thread Tripod Screws

(1.1) This standard specifies the location of the head mounting sockets in the mounting plates of motion-picture and television cameras intended to mate with 1/4-inch-20 thread and 3/8-inch-16 thread locking screws. (1.2) The standard is not intended to prescribe design except for the dimensions affecting inter-changeability; for this reason, the socket figures indicate two of many possible designs.