Baby / Junior Offset
A Baby/Junior Offset (also known as an offset arm) is a specialized rigging accessory designed to move a mounting point away from the vertical axis of a stand. This tool consists of a horizontal metal arm with a mounting pin on one end and a receiver on the other. It typically provides about 12 inches of clearance. By shifting the light or equipment to the side, filmmakers gain greater flexibility in positioning and tilting their gear.
Why Use an Offset Arm?
Standard light stands can sometimes limit the physical movement of a lamp head. If a light is mounted directly on top of a stand, the stand’s vertical column may prevent the light from tilting straight down.
Extreme Tilting and Under-Slinging
An offset arm allows you to “under-sling” a light fixture. By mounting the light underneath the offset arm rather than on top of the stand, you create extra space. This enables the cinematographer to tilt the light at extreme downward angles. This is particularly useful for top-lighting a subject or illuminating a tabletop setup where the stand must remain out of the frame.
Clearing Obstacles
Offsets are excellent for reaching over the top of set walls or around architectural obstacles. If a light stand cannot be placed directly next to a wall, an offset arm can reach out from the stand to position the light exactly where it needs to be. This keeps the base of the stand hidden while the light performs its job.
Understanding the Sizes
Like most grip hardware, offsets come in two primary sizes to match industry standards.
| Baby Offset | This arm features a 5/8-inch (16mm) pin and receiver. It is designed for smaller, lighter fixtures like LED mats, small Fresnels, or field monitors. |
| Junior Offset | This version uses a 1-1/8-inch (28mm) pin and receiver. It is much more robust and is built to handle the weight of heavy-duty cinema lights, such as large HMI units or high-output LED panels. |
Non-Lighting Applications
Beyond lighting, offsets are a staple for camera and DIT (Digital Imaging Technician) carts. Crew members often use a Baby Offset to mount production monitors to the side of a cart. This keeps the monitor at eye level and easily viewable without taking up valuable workspace on the top shelf of the cart.
Essential Safety Tips
Using an offset arm changes the center of gravity of your light stand. Because the weight is now 12 inches away from the center, the stand is much more likely to tip over.
| 1. | Use Sandbags | You must always use a sandbag on the leg of the stand that is directly underneath the offset arm. This counteracts the weight and prevents the rig from falling. |
| 2. | Align the Legs | Ensure one of the stand’s legs is pointing in the same direction as the offset arm. This provides the most stable base for the lopsided weight. |
| 3. | Check Weight Limits | Never exceed the weight capacity of the offset arm, especially when using a Baby Offset with a heavy fixture. If the arm bends or feels unstable, switch to a more robust Junior version. |
