Motorized matte box with infinitely adjustable framing blades — reframes mid-shot without cutting. Locks unwanted image areas or adapts composition dynamically — staple in commercial and premium TV production.
Dynamic Frame System
If you want to change the image composition during a shot without moving the camera or cutting afterward – that's where the Dynamic Frame System comes into play. It's a motorized matte box system that allows you to infinitely adjust the framing elements while the camera is rolling. The top, bottom, and side matte elements move independently of each other, controlled either manually or remotely. The result: seamless composition changes within a running shot.
In practice, it works like this: You set your initial frame – let's say, a wide-angle establisher with plenty of environment. As the actor speaks or moves, you move the side matte elements inward, unconsciously focusing the viewer on the face. Or vice versa: You start tight on a detail and open up the matte to reveal the context. This creates subtle, organic visual storytelling that feels like an invisible cut – all while the camera remains stationary. The advantage is obvious: fewer cuts, less setup stress, more creative freedom in the moment.
The system has become particularly established in commercials and high-format productions – for example, in cinema or for premium content. Why? Because it greatly refines narrative control. You could isolate a facial reaction, then gradually show the surroundings, all without a camera move. This feels more natural to the viewer than a classic zoom, and you avoid the optical artifacts that zooming brings. In high-end commercials, this has become standard.
Technically, you need a robust matte box – ideally with motorized matte sliders and remote control via DMX or wireless. The precision must be high, otherwise, you'll see the matte edges flutter. Timing is also critical: smooth, imperceptible movements work, while jerky matte adjustments look cheap. A focus puller or a second AC on the remote control is often necessary to operate the matte during a performance without losing focus. Also, keep in mind that matte movements can be visible in the shot if the lighting is too harsh – soft, diffused light makes the transitions more invisible.
Related to other composition techniques like reframing or digital cropping, the Dynamic Frame System remains optical-mechanical and leaves no digital traces. For some filmmakers, this is a significant difference.