PrimeLight Design VoxBox Pro MK3

The VoxBox Pro MK3 is a down-the-lens interview mirror-box: a device that mounts in front of your camera lens and uses a system of precision mirrors to allow a subject to look into the lens — while seeing the interviewer reflected — giving the viewer the impression of direct, natural eye contact. The tablet holder accessory allows the unit to be converted into a teleprompter for additional functionality.

Direct-to-camera eyeline has been a trusted interview technique for over two decades — and it remains one of the most effective ways to create genuine on-screen connection. The VoxBox Pro MK3 delivers this proven approach in a refined, modern form, trusted by cinematographers, documentary teams, broadcast crews, and content creators worldwide.

Building on the established VoxBox design, the MK3 introduces enhanced versatility, improved performance, and real-world practicality for today’s productions. From intimate interviews to presenter-led content and feature documentaries, the VoxBox Pro MK3 enables natural, consistent eye contact down-the-lens through a simple optical mirror system — requiring no power, electronics, or additional technology.

Key Features

• Direct-to-lens engagement – Uses precision beamsplitter glass to maintain eye contact with the camera for natural connection.
• Fast, tool-free setup – Attaches to standard 15mm rails or light stand in under 2 minutes. An optional 19mm riser is available separately.
• Wider lens support – Now compatible with lenses down to 28 mm for fuller environmental context.
• Industry-friendly design – Solves common rigging clearance issues (e.g., Sony FX6 top handle).
• Integrated 4x4 & 4x5.65″ filter tray – Add ND, diffusion, or creative filters directly at the lens plane.
• Pro teleprompting functionality – Converts instantly with an iPad or tablet holder (supports up to 13″ devices).
• Rugged travel case included – IP67 hard case with custom foam.
• Designed and made in Britain – Precision carbon-infused polymer body built for professional use.

How does it work?

The VoxBox Pro creates its connection using physics, not tech. It attaches to the front of your camera and utilizes a clever system of precision mirrors (a beamsplitter and a secondary mirror) to fold the line of sight.

This means you achieve the perfect shot with no AI tricks, no extra cameras, no tablets, and no technology that can fail.

• The Subject: Looks directly into the lens but sees a clear reflection of the interviewer's face in the glass.
• The Interviewer: Sits to the side of the camera and looks through a portal in the box to see the subject.
• The Result: The subject feels like they are having a natural face-to-face conversation, but on film, they are staring perfectly into the lens — resulting in the authentic, confident eye contact that cinematic storytelling demands.

Seamless integration. Effortless setup.

The VoxBox Pro MK3 seamlessly integrates into any professional camera setup. No cumbersome baseplate, no special hardware. Its tool-free design sets up in under two minutes, saving critical time on set.

• Standard rail mount: Mount it directly to your existing 15mm rail bars, just like fitting a matte box. Kit includes rail block with height adjustment (rails not included). An optional 19mm rail block is available separately.
• Light stand mount: A standard 3/8ths inch threaded hole on the unit allows it to be attached to standard grip accessories. The included 16mm adaptor allows easy mounting to a light stand — ideal if you don't have rails.
• Four interviewer positions: Built for real-world locations. The VoxBox Pro is designed for cramped offices and awkward corners. With four possible interviewer positions around the unit, you can adapt instantly. For solo shooters, the camera operator can conduct the interview directly while monitoring the shot.

Upgrading from the MK2? New features explained

Every element of the VoxBox Pro MK3 has been re-engineered from real-world feedback by working cinematographers.

• A wider perspective: The MK3's redesigned system now accommodates wider lenses down to 28mm*, allowing for more environmental context. (*Test conducted with Sony G-Master 24-70mm; Sony FX9 full frame 6K).
• Solves handle and rail clearance issues: The redesigned housing solves the clearance conflict with the Sony FX6 top handle, allowing for seamless rigging. It also provides clearance for longer support rods.
• Integral filter tray: Integrates standard 4x4" and 4x5.65" PV filter support. A dual-size filter tray is included, allowing you to use ND, diffusion, or Soft FX right at the lens.
• Need a teleprompter? The included tablet holder clips on instantly, transforming your eyeline tool into a professional teleprompter. The mount is robust enough to accommodate larger devices, including the 13-inch iPad Pro.

Built for the Road

• Ships standard in a rugged, IP67-rated hard case engineered to withstand the demands of airline travel, the VoxBox Pro MK3 is protected by a custom-cut, high-density foam insert that precisely cradles each component to absorb impact and prevent movement. For added peace of mind, the beamsplitter glass remains securely fitted within the main unit, while the side mirror is stored separately in a dedicated recess in the case lid, ensuring both critical optical elements are protected during transport.

What’s In the box

• Main unit
• Beamsplitter glass
• Tilting side mirror
• Tablet holder
• Doughnuts (63, 80 & 112mm)
• 16mm receiver
• Dual 4X4 and 4X5.6 inch filter tray
• Printed instruction manual
• Hard Case with laser-cut foam

Specifications

• Weight of main unit with beamsplitter glass, without mounts: 1.9kg (4.1lbs)
• Dimensions of main unit, without mounts: W354 x H215 x D275mm (W13.9 x H8.4 x D10.8 inch)
• Aperture at rear of main unit: 140mm (5.5 inch)
• Widest focal length (full-frame sensor): Approx 28mm (Test conducted with Sony 24-70mm lens, FX9 full-frame 6K)
• Tablet holder maximum device size: 227mm (8.9 inch) (measured between the two clamps)
• Beamsplitter glass T/R ratio: 60/40
• Light loss through beamsplitter glass: <1 stop
• Hard case external Dimensions: W555 x H306 x D428mm (21.8 x 12 x 16.8 inch)
• Total weight (case and contents): 9.2kg (20.2lbs)
• Total weight (as shipped): 10kg (22lbs)