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Introducing the Flex 13, offering the cleanest data that $1K can buy.
With an impressive 1.3 million pixels of resolution, 120 FPS sample rate, and an immense 56° field of view, the Flex 13 is an achievement in efficient, affordable motion capture. Enjoy the precision and accuracy of a professional capture system at a price tuned for AAA and indie studios alike.
The Flex 13’s 1.3 MP imager offers over 4x the resolution of a Flex 3. When combined with OptiTrack’s proprietary real-time processing algorithms, it can track motions within a tolerance of less than 0.5 mm—ideal for rigorous tracking applications, such as multi-actor capture and complex motion tracking.
You asked for more capture volume, and we were listening. When deployed with the default 56° lens in a standard 20’ × 20’ arrangement, the camera can attain an active capture area that is among the largest in the industry, which allows for extensive capture volumes even in modest tracking environments.
Precision Grayscale | Object
The Flex 13 can send a variety of pre-processed image types to the PC, resulting in more efficient imaging and system scaling. Image processing types include:
Unique to OptiTrack cameras, on-camera MJPEG compression consumes 1/10th the bandwidth of uncompressed video while still enabling real-time grayscale video at full resolution and full frame rate (up to 1280 × 1024 @ 120 FPS). Compact, high-quality grayscale video enables image preview with multiple cameras, simultaneously—an indispensable tool for camera aiming and focusing during rig setup and calibration.
Access MJPEG grayscale video at up to 120 FPS and transform any Flex 13 into a high-speed scene camera. Simplify camera aiming and calibration, optimize skeleton configuration, provide live capture feedback, and improve post-capture cleanup with a variety of grayscale video options.
Because Flex 13 cameras can operate in grayscale mode, any of the cameras in your volume can be transformed back into a scene camera after calibration, enabling scene video that has exact position and orientation relative to the tracking volume.
Once scene cameras are calibrated within the volume, you can visually preview potential flaws for a higher level of accuracy. Simply compare the calibrated scene video with overlaid points to confirm that the skeleton aligns with the actor’s body segments and corresponding markers.
Monitor the relationship between the actor and skeleton to confirm accurate tracking or to quickly diagnose unexpected behavior. Grayscale scene video is particularly useful during facial motion capture, offering real-time feedback for performance analysis.
One person can efficiently setup and aim a complete Flex 13 system with OptiTrack's on-camera Aim Assist. One button press brings the camera view to full screen, sets the image to grayscale, retracts the IR filter and increases the exposure for additional lighting and better image clarity. The image is perfect so that placing reference markers on the capture volume floor is no longer necessary. Aim each camera conveniently and precisely without even needing to touch the software interface. Once a camera has been aimed, move on to the next with a single button push.
Customize your Flex 13’s lens filter for standard IR motion capture or visible-spectrum reference video, for light filtering that is perfectly suited to your capture environment and application. Include the Filter Switcher add-on for quickly swapping between both filtering options.
The Flex 13 can be optimized for a variety of applications with custom-designed, interchangeable M12 lenses. Choose between 5.5mm and 8mm EFL lenses to adapt your cameras to your ideal capture volume. Both feature a special spring focus assist, very low distortion, and fast F#1.8 apertures for increased tracking distance. Typical applications utilize 5.5mm lenses for standard tracking applications and 8mm lenses when additional range or pixel density is required.
Flex 13 cameras emit 850nm IR light, which is nearly invisible, for inconspicuous illumination that prevents the vision fatigue and unwanted attention to your capture rig caused by cameras that emit visible spectrum light.
Improve power regulation, camera syncing, tracking distance, and more.
OptiSync1 is OptiTrack's custom synchronization system, which sends and receives sync signals over USB cable. As a result, cabling is reduced by 50%, which enables faster and simpler setup.
Integrate Flex 13 cameras into scientific and studio ecosystems with external sync in and out1, enabled with the OptiHub 2. Utilize frame triggers or free-run triggering to synchronize frame cycling with external software controls and hardware components like force plates and shutter glasses.
If you require Genlock and SMPTE capabilities, please see the Prime Series camera and eSync 2.
Incorporate Flex 13 cameras into custom vision or tracking applications via the free Camera SDK.
|Close Table||Prime 41Large Volume Mocap||Prime 17WMed-Large Volume, High Speed||Prime 13Medium Volume, High Speed||Prime 13WWide FOV, High Speed||Slim 13ELow Profile & OEM||Flex 13Medium Volume Mocap||Flex 3Small Volume Mocap||Slim 3UComputer Vision & OEM||V120:Trio6DoF Desktop Tracking||V120:Duo6DoF Desktop Tracking|
|Resolution||2048 × 2048||1664 × 1088||1280 × 1024||640 × 480||640 × 480 (×3)||640 × 480 (×2)|
|Frame Rate||180 FPS||360 FPS||240 FPS||120 FPS||100 FPS||120 FPS|
|Latency||5.5 ms||2.8 ms||4.2 ms||8.3 ms||10 ms||8.3 ms|
|Single-device Multi-camera Tracking||No||Yes|
|Maximum Units Per Workstation||96+||24||1|
Using 5/8 inch markers
|51°||70°||56°||82°||56°||56°||46°||n/a||47° 6||47° 6|
|n/a||n/a||42°||n/a||42°||42°||38°, 58°||38°, 46°, 58°, Other7||n/a||n/a|
|n/a||n/a||34°||n/a||34°||34°||29°, 45°||29°, 35°, 45°, Other7||n/a||n/a|
|Synchronization Method||Network||OptiSync||Wired and OptiSync||Wired8||n/a9||n/a9|
|Image Processing Modes||Raw Grayscale, Segment, Object, and MJPEG10, 11, 12||Precision Grayscale, Raw Grayscale, Segment, Object, and MJPEG||Precision Grayscale, Segment, and MJPEG|
|Number of LEDs||170||20 (UHP)13||62||10 (UHP)13||n/a||28||26||n/a||26 (×3)||26 (×2)|
|LED Strobe Mode||Yes||n/a||Yes||n/a||Yes|
|LED Intensity Control||Yes||n/a||Yes||n/a||Yes|
|Electronic Exposure Control||Yes|
|Frame Rate Control||Yes|
|Camera Body||Aluminum & Polycarbonate||Aluminum||Aluminum14||Aluminum|
|Standard Tripod Mount