The JVC Professional 700380207025 is a specialized Rear Control Kit designed to provide external camera control interfaces for a specific professional broadcast lens, the Fujinon 20x AF (Auto-Focus) series, when used with compatible JVC professional camcorders. This interface kit serves as a critical link, enabling the camera's internal systems to communicate with and control the advanced servo-driven functions of the attached Fujinon zoom lens. It translates operator inputs—from both the camera's rocker switches and external control units—into precise commands for the lens's zoom, focus, and iris motors, ensuring smooth and responsive operation. This integration is essential for broadcast, documentary, and live event videography where the combined system of camera and lens must perform as a single, reliable unit.

The kit typically includes the necessary cabling and interface hardware to physically and electronically connect the Fujinon lens's 26-pin or 38-pin control port to the designated 20-pin lens connector on the JVC camera body, such as models in the GY-HM series. It facilitates access to the full feature set of the Fujinon 20x AF lens, including its auto-focus capabilities, which rely on data communication between the lens's internal processor and the camera. By establishing this connection, the kit allows the camera operator to utilize the lens's one-touch auto-focus, manual focus override, and variable speed zoom control directly from the camera's handgrip or an attached remote zoom controller like those made by VariZoom, enabling greater operational flexibility and precision.

Engineered for professional use, this interface kit ensures robust, error-free communication and power delivery between the camera and lens. It is designed to be a reliable, plug-and-play solution that expands the functionality of JVC's camera systems, allowing cinematographers and videographers to leverage the superior optical performance and servo mechanics of Fujinon's broadcast lenses. This interoperability is key for professionals who require specific lens characteristics—such as the Fujinon 20x's focal range, aperture, and optical quality—while maintaining the workflow and color science of their JVC camera ecosystem, creating a powerful and customized production tool.