Receiver mount for film lights with 5/8"-27 TPI female threads; supports up to 2.5 kW HMI or LED panels, 360° swivel with locking mechanism.
Technical Details
The Junior Receiver uses a 5/8"-27 TPI (Threads Per Inch) mount with a maximum insertion depth of 19 mm. The receiver is made of hardened steel or aluminum and weighs between 0.8-1.5 kg depending on the version. Modern Junior Receivers feature a 360° pan range and 90° tilt angle with locking knobs. Variants include Baby-Junior adapters (reduction to 1/2-inch), Double Junior Receivers for two lights, and offset versions with a lateral displacement of 15-30 cm.
History & Development
Mole-Richardson introduced the Junior Receiver standard in 1947 in response to the growing demand for more manageable lighting solutions. Film production was increasingly moving from studios to real locations, requiring more compact equipment. In 1962, Arri expanded the standard with metric variants for the European market. Matthews Studio Equipment standardized the current tolerances and safety regulations in 1978.
Practical Use in Film
Junior Receivers are preferably used with HMI lights up to 2.5 kW and LED panels. In "Blade Runner 2049" (2017), DoP Roger Deakins used Junior-mounted ARRI SkyPanels for precise facial lighting in close-ups. The compact design allows for close placement between actors and the camera. Disadvantages become apparent with heavy Tungsten lights over 2 kW, where the load limit is reached and a switch to Senior systems is necessary.
Comparison & Alternatives
Junior Receivers differ from Senior Receivers (1 1/8-inch, 50 kg load capacity) in terms of lower weight and space requirements. Baby Pins (1/2-inch) are suitable for lights under 5 kg. Modern quick-release systems like the Manfrotto Super Clamps are increasingly replacing screwed connections in documentary productions. Magic Arms and Friction Arms offer more flexible positioning but do not achieve the stability of Junior Receivers for longer setups.