Junior Offset Arm connects Junior receiver (5/8") to Baby spigot (1/4") in 6, 12, or 18" lengths. Supports up to 2.3 kg lights off-axis on C-stands.
Technical Details
Standard Junior Offset Arms typically measure 6, 12, or 18 inches (15, 30, or 45 cm) in length and are rated for loads up to 2.3 kg. The Junior receiver (5/8 inch with 11 TPI thread) connects to C-stands or Junior boom arms, while the Baby spigot (1/4 inch) accommodates smaller Fresnel lights, LED panels, or Dedolights. High-quality models from Matthews Studio Equipment or Manfrotto utilize anodized aluminum with a wall thickness of 3mm. Some variants feature an additional 90-degree rotation at the Baby end for vertical light orientation.
History & Development
The Junior Offset Arm evolved in the 1960s from the need to flexibly position the smaller tungsten lights that were emerging at the time onto existing Junior stands. Matthews Studio Equipment standardized the 5/8-inch Junior connection in 1971, which is now used industry-wide. With the LED revolution starting in 2010, this accessory gained new relevance, as LED panels are often lighter and require precise positioning. Modern carbon fiber versions reduce their own weight by 40% compared to aluminum models.
Practical Use in Film
In "Blade Runner 2049" (2017), DoP Roger Deakins used Junior Offset Arms to precisely position Dedolights as eye lights without the stand legs intruding into the frame. For automotive shoots, 12-inch Offset Arms are used to swing LED panels over hoods while the stand remains outside the reflection zone. The offset arm reduces shadows from the stand legs and allows for tighter camera angles. Disadvantage: The off-center weight can cause C-stands to tip if handled carelessly.
Comparison & Alternatives
Unlike a straight Junior-to-Baby adapter, the Offset Arm creates spatial distance from the main axis. Magic Arms offer more flexibility but are heavier and more expensive. Articulating Arms with ball joints are increasingly replacing rigid Offset Arms, especially for LED panels weighing under 1 kg. For loads exceeding 2.5 kg, Junior Extension Arms with additional bracing are required. In tight studio spaces, the 6-inch Offset Arm remains indispensable for minimal adjustments.