SmallRig Half Cage Sony A7 IV/A7R IV camera cage 1/4" Black

The SmallRig Half Cage for Sony Alpha 7 IV/Alpha 7S III/Alpha 1/Alpha 7R IV (model 3639) is a lightweight, sturdy camera cage that provides accessory mounting points and protection while maintaining access to the camera's dials, buttons and grip. It secures the camera with two locking side plates and a 1/4"-20 bottom screw to prevent deflection and includes built-in protective spacers to prevent scratches. The base features an Arca-compatible quick release plate compatible with DJI RS 2/RSC 2 stabilizers, and multiple threaded mounting points for attaching handles, monitors, microphones and lights. A built-in magnetic spanner assists with assembly and disassembly, and an optional HDMI Cable Clamp (3000) is available to protect interfaces and ensure stable signal transmission with compatible camera models.

Advantages

The cage combines durable metal construction with a compact form factor, offering secure camera locking and full access to controls. Multiple 1/4"-20 and ARRI 3/8"-16 locating holes and cold shoes expand mounting options for accessories. The Arca quick release plate on the bottom enables easy integration with DJI RS 2/RSC 2 gimbals. Built-in protective spacers and the included locking plates reduce risk of scratches and movement during use. The integrated magnetic spanner simplifies tool-free adjustments.

Suitable for

• Videographers using Sony Alpha 7 IV, Alpha 7S III, Alpha 1 or Alpha 7R IV cameras
• Runs with DJI RS 2 or RSC 2 stabilizers (Arca quick release compatible)
• On-camera rigs requiring microphone, LED light or monitor mounting

Key specifications

• Model: SmallRig Half Cage 3639
• Compatible cameras: Sony Alpha 7 IV / Alpha 7S III / Alpha 1 / Alpha 7R IV
• Bottom thread: 1/4"-20 screw to lock camera
• Mounting points: 1/4"-20 threaded holes, ARRI 3/8"-16 locating holes, cold shoes
• Quick release: Arca-compatible plate (bottom), compatible with DJI RS 2 / RSC 2
• Accessories: Optional HDMI Cable Clamp 3000; built-in magnetic spanner
• Color: Black
• Manufacturer MPN: 118730
• EAN: 6941590008042

How to use

Attach the half cage onto the camera body and secure it using the 1/4"-20 bottom screw and the two locking side plates to prevent movement. Verify that protective spacers align with the camera surface to avoid scratches. Mount any required accessories such as top handle, side handle, monitor or microphone using the provided 1/4"-20 or ARRI 3/8"-16 holes and cold shoes. If using a DJI RS 2 or RSC 2 stabilizer, fasten the Arca-compatible quick release plate to the gimbal. Use the built-in magnetic spanner to tighten or loosen mounting screws during setup and disassembly.

Usage recommendations

To maintain stable signal transmission when recording, use the optional HDMI Cable Clamp 3000 with compatible camera models. Regularly check and tighten locking plates and screws before each shoot; avoid over-tightening to prevent thread damage.