PrimeLight Design VoxBox Pro MK3 Announced – Support for Wide Lenses and Integrated Filtration

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by Nino LeitnerJanuary 19^th, 2026

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PrimeLight Design has unveiled the VoxBox Pro MK3, the third generation of its optical mirror-based interview system designed for direct-to-camera eye contact. The updated unit now supports lenses as wide as 28mm on full-frame sensors, includes an integrated dual-size filter tray, and addresses common rigging issues with cameras like the Sony FX6.

The UK-based company has been refining its VoxBox line for over six years now, building a reputation among documentary crews, broadcast teams, and content creators who need reliable down-the-lens eyeline without the complexity of electronic teleprompter setups or AI-driven solutions. The MK3 represents the most significant update to the VoxBox Pro series, incorporating feedback from cinematographers working with the system on productions worldwide.

How the VoxBox Pro MK3 system works

For those unfamiliar with the concept, the VoxBox Pro MK3 uses a high-grade beamsplitter glass and mirror arrangement to fold the subject’s line of sight directly into the camera lens. The subject maintains a natural face-to-face conversation with the interviewer positioned to the side, while the camera captures what appears to be direct-to-lens eye contact. No power, electronics, or additional cameras are required; the system relies entirely on optical physics.

This approach has proven particularly valuable for documentary work, corporate interviews, and presenter-led content where authentic audience connection matters. The challenge has always been making such systems practical for modern production workflows, and that appears to be the focus of the MK3 redesign.

Wider lens compatibility

One of the most requested improvements addresses focal length limitations. Previous VoxBox Pro iterations were constrained to approximately 35mm on full-frame sensors before vignetting became visible. The MK3 features a redesigned optical path that now supports lenses down to 28mm on full-frame, allowing cinematographers to capture more environmental context in their interview setups. This is a meaningful improvement for documentary shooters who want to establish location atmosphere while maintaining intimate eye contact.

Better camera clearance and rigging

PrimeLight Design specifically mentions the Sony FX6 in this update, noting that the new housing design accommodates the camera’s top handle positioning. FX6 users will recognize this pain point; the unconventional placement of XLR connectors and the top handle on Sony’s popular cinema camera has caused compatibility issues with various matte boxes and front-mounted accessories. The MK3 also provides better clearance for longer support rods, addressing another common complaint from previous generations.

The unit mounts to standard 15mm rails in under two minutes without tools, a claim the company has consistently made across its VoxBox line. For lightweight setups or solo operators working with DSLRs and mirrorless cameras, a 3/8-inch threaded hole and included 16mm adaptor allow direct mounting to a light stand, bypassing the need for a rod-based rig entirely.

Integrated filter tray

For the first time in the VoxBox Pro series, the MK3 includes an integrated dual-size filter tray supporting both standard 4×4-inch and 4×5.65-inch PV filters. This allows DPs to add ND or diffusion directly at the lens plane without additional rigging. The VoxBox Air, which we covered when it launched in 2024, introduced this feature to the foldable variant; it now comes to the more robust Pro line.

Teleprompter functionality

The MK3 includes a tablet holder that clips on instantly, converting the interview system into a professional prompter. PrimeLight Design states it can accommodate tablets up to the 13-inch iPad Pro, a notable increase in supported device size that reflects the growing preference for larger prompter displays. This dual-purpose functionality has been a selling point for the VoxBox line, allowing crews to use a single accessory for both interview and scripted content.

Build quality and transport

The MK3 is constructed from carbon-infused polymer, continuing the material approach used in the VoxBox Air. It ships in a custom-designed IP67-rated hard case with high-density foam to protect the precision beamsplitter glass and secondary mirrors during transport. This is a step up from the padded bag approach of lighter variants and reflects the Pro designation’s focus on durability for demanding production environments.

The system offers four possible interviewer positions, providing flexibility when working in cramped offices, small studios, or awkward location spaces where traditional interview setups become impractical.

Pricing and availability of the VoxBox Pro MK3

The VoxBox Pro MK3 (SKU: VBP-3001) is priced at £1,499 / €1,699 / $1,949 and available through authorized video resellers as well as direct from PrimeLight Design. This positions it at the upper end of the optical interview system market, though considerably below the cost of traditional Interrotron setups that require multiple cameras and monitors.

For documentary crews and broadcast teams already invested in the VoxBox ecosystem, the MK3 addresses several practical workflow concerns while maintaining the no-power, no-electronics simplicity that defines the product line.

Have you used optical interview systems like the VoxBox in your work? What improvements would make the biggest difference to your interview setups? Don’t hesitate to let us know in the comments below!