A fixed wide-angle camera is right for a small room and wrong for a large one: the far end of a boardroom becomes a row of small figures and the presenter at the whiteboard is a speck. A PTZ camera – pan, tilt, zoom – solves this with a motorised head and an optical zoom lens that can frame any part of the room at full resolution. Nearity’s PTZ cameras bring this to rooms that use Teams, Zoom, 3CX or any other platform over USB. This article explains what PTZ does, what the specifications mean and how to deploy one.
What PTZ gives you
Optical zoom. Unlike the digital zoom on a fixed camera, which crops and loses resolution, optical zoom moves lens elements and keeps the full sensor resolution on the framed area. A 12x or 20x lens can fill the frame with a presenter at the far end of a lecture hall.
Presets. Positions saved for the whole table, the presenter, the whiteboard and the audience, recalled from a remote or a touch panel. A meeting host switches views in a second.
Tracking. Auto-tracking follows a presenter as they move; voice tracking, with a microphone array, frames whoever is speaking. Both remove the need for someone to operate the camera.
Multiple outputs. USB for the meeting PC, and often HDMI, SDI or IP streaming for recording, lecture capture or sending the picture to a second display.
Where PTZ is the right choice
- Boardrooms – long tables where the camera must frame the far end and the chair.
- Training rooms and classrooms – a presenter who moves, a whiteboard and an audience.
- Lecture theatres and auditoriums – distance, and often a need to record.
- Town halls and events – streaming a stage to remote staff.
- Telemedicine and courtrooms – specific views that must be recalled exactly.
Specifications to check
Zoom ratio – 12x for a boardroom, 20x or more for a hall. Sensor and resolution – 4K or 1080p; 4K helps when the picture is cropped downstream. Field of view at wide – enough to capture the whole room from the mounting position. Pan and tilt range and speed – and whether movement is quiet. Outputs – USB, HDMI, SDI, IP. Control – IR remote, RS-232/485, IP, and compatibility with room control systems. Tracking – presenter, voice, or both, and how it behaves with several people moving.
Installation
Mount the camera where it sees the whole room from a natural angle: wall-mounted above the display for boardrooms, or on a rear wall for lecture capture facing the presenter. Run USB over an active cable or a USB extender for distances beyond a few metres; use HDMI or IP for recording paths. Set and label presets, and put the controls where the host sits. For voice tracking, pair the camera with the microphone array it is designed for and position the array centrally.
Audio for large rooms
Large rooms need more than a speakerphone: ceiling microphone arrays or several linked tabletop units, a DSP for echo cancellation across the room, and speakers placed so that remote participants are heard at the back. Plan audio and video together; a PTZ camera with poor audio is a wasted investment.
Nearity PTZ through Zen
Zen Interactive Technologies distributes Nearity in the UAE and GCC, including PTZ cameras with tracking, and the microphones and speakerphones that go with them. We can specify a boardroom or training-room package for a given room size and platform and supply it from Dubai. See the Nearity page.