OptiTrack Flex 3

OptiTrack Flex 3

A small volume motion capture camera that's surprisingly affordable. The OptiTrack Flex 3 camera offers integrated image capture, processing, and motion tracking in a powerful, compact package. Customize your camera with user-changeable M12 lenses, black or red case treatments, and OptiTrack's exclusive Filter Switcher technology. Scalable, modular, and a fraction of the price you would expect - Flex 3 cameras deliver the world's premier optical tracking value proposition.


The Flex 3 is capable of capturing fast moving objects with its global shutter imager and 100 FPS capture speed. By maximizing its 640 × 480 VGA resolution through advanced image processing algorithms, the Flex 3 can also track markers down to sub-millimeter movements with repeatable accuracy.

Technical Specifications:

Flex 3 Dimensions

Width: 1.78 inches (45.2 mm)

Height: 2.94 inches (74.7 mm)

Depth: 1.44 inches (36.6 mm)

Weight: 4.2 ounces (0.1 kg)


Image Sensor

Imager Size: 4.5 mm x 2.88 mm

Pixel Size: 6 µm × 6 µm

Imager Resolution: 640 x 480 (VGA, windowed from 752 x 480)

Frame Rate: 25, 50, 100 FPS

- Frame decimation (transmit every Nth frame)

Spatial Dimension: 320 x 240, 160 x 120

Latency: 10 ms


Global Shutter Speed

- Default: 1/1000th of a sec. (1 ms)

- Minimum: 1/50,000th of a sec. (20 µs)


Image Processing Types



Precision Grayscale

Raw Grayscale

MJPEG Grayscale


LED Ring

26 LEDs

850 nm infrared

Adjustable brightness

Strobe or Continuous Illumination



Lens & Filter

Stock Lens:

4.5 mm F#1.6

- Horizontal FOV: 46°

- Vertical FOV: 35°

Optional Lenses:

3.5 mm F#1.6

- Horizontal FOV: 58°

- Vertical FOV: 45°

M12 Lens Mount

Adjustable focus w/ spring assist

800 nm IR long pass filter

Optional: 800 nm IR long pass filter w/ Filter Switcher


Camera Body

Mounting: 1/4"-20 tripod thread (x2)

2 digit numeric LEDs status indicators


Input/Output & Power

Data: USD 2.0

Camera Sync: USB 2.0 or Wired Sync

Power: USB 2.0

- Standard: 5V @ 490mA

- High: 680mA