Camera Mount Structures
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Choosing an appropriate camera mounting solution is very important when setting up a capture volume. A stable setup not only prevents camera damage from unexpected collisions, but it also maintains calibration quality throughout capture. All OptiTrack cameras have ¼-20 UNC Threaded holes – ¼ inch diameter, 20 threads/inch – which is the industry standard for mounting cameras. Before planning the mount structures, make sure that you have optimized your plans.
Due to thermal expansion issues when mounted to walls, we recommend using Trusses or Tripods as primary mounting structures.
Trusses will offer the most stability and are less prone to unwanted camera movement for more accurate tracking.
Tripods alternatively, offer more mobility to change the capture volume.
Wall Mounts and Speed Rails offer the ability to maximize space, but are the most susceptible to vibration from HVAC systems, thermal expansion, earthquake resistant buildings, etc. This vibration can cause inaccurate calibration and tracking.
Camera clamps are used to fasten cameras onto stable mounting structures, such as a truss system, wall mounts, speed rails, or large tripods. There are some considerations when choosing a clamp for each camera. Most importantly, the clamps need to be able to bear the camera weight. Also, we recommend using clamps that offer adjustment of all 3 degrees of orientation: pitch, yaw, and roll. The stability of your mounting structure and the placement of each camera is very important for the quality of the mocap data, and as such we recommend using one of the mounting structures suggested in this page.
Manfrotto clamps come in three parts:
Manfrotto 035 Super Clamp
Manfrotto 056 3-Way, Pan-and-Tilt Head with 1/4"-20 Mount
Reversible Short Brass Stud
For proper assembly, please follow the steps below:
Place the brass stud into the 16mm hexagon socket in the Manfrotto Super Clamp.
Depress the spring-loaded button so the brass stud will lock into place.
Tighten the safety pin mechanism to secure the brass stud within the hexagon socket. Be sure that the 3/8″ screw (larger) end of the stud is facing out.
From here, attach the Super Clamp to the 3-Way, Pan-and-Tilt Head by screwing in the brass stud into the screw hole of the 3-Way, Pan-and-Tilt Head.
Be sure to tighten these two components fairly tight as you don't want them to swivel when installing cameras. It helps to first tighten the 360° swivel on the 3-Way, Pan-and-Tilt Head as this will ensure that any unwanted swivel will not occur when tightening the two components together.
Once, these two components are attached you should have a fully functioning clamp to attach your cameras to.
Large scale mounting structures, such as trusses and wall mounts, are the most stable and can be used to reliably cover larger volumes. Cameras are well-fixed and the need for recalibration is reduced. However, they are not easily portable and cannot be easily adjusted. On the other hand, smaller mounting structures, such as tripods and C-clamps, are more portable, simple to setup, and can be easily adjusted if needed. However, they are less stable and more vulnerable to external impacts, which can distort the camera position and the calibration. Choosing your mounting structure depends on the capture environment, the size of the volume, and the purpose of capture. You can use a combination of both methods as needed for unique applications.
A truss system provides a sturdy structure and a customizable layout that can cover diverse capture volume sizes, ranging from a small volume to a very large volume. Cameras are mounted on the truss beam using the camera clamps.
Follow the truss installation instruction and assemble the trusses on-site, and use the fastening pins to secure each truss segment.
Fasten the base truss to the ground.
Connect each of the segments and fix them by inserting a fastening pin.
Attach clamps to the cameras.
Mount the clamps to the truss beam.
Tripods are portable and simple to install, and they are not restricted to the environment constraints. There are various sizes and types of tripods for different applications. In order to ensure its stability, each tripod needs to be installed on a hard surface (e.g. concrete). Usually, one camera is attached per tripod, but camera clamps can be used in combination to fasten multiple cameras along the leg as long as the tripod is stable enough to bear the weight. Note that tripod setups are less stable and vulnerable to physical impacts. Any camera movements after calibration will distort the calibration quality, and the volume will need to be re-calibrated.
Wall mounts and speed rails are used with camera clamps to mount the cameras along the wall of the capture volume. This setup is very stable, and it has a low chance of getting interfered with by way of physical contact. The capture volume size and layout will depend on the size of the room. However, note that the wall, or the building itself, may slightly fluctuate due to the changing ambient temperature throughout the day. Therefore, you may need to routinely re-calibrate the volume if you are looking for precise measurements.
Although we have instructions below for installing speed rails, we highly recommend leaving the installation to qualified contractors.
General Tools
Cordless drill
Socket driver bits for drill
Various drill bits
Hex head Allen wrench set
Laser level
Speed Rail Parts
Pre-cut rails
Internal locking splice
5" offset wall mount bracket
End caps (should already be pre-installed onto pipes)
Elbow speed rail bracket (optional)
Tee speed rail bracket (optional)
Wood Stud Setup
Wood frame studs behind drywall requires:
Pre-drilled holes.
2 1/2" long x 5/16" hex head wood lag screws.
Metal Stud Framing Setup
Metal stud framing behind drywall requires:
Undersized pre-drilled holes as a marker in the drywall.
2"long x 5/16" self tapping metal screws with hex head.
Concrete Block/Wall Setup
Requires:
Pre-drilled holes.
Concrete anchors inserted into pre-drilled hole.
2 1/2" concrete lags.
Pre-drill bracket locations.
If working in a smaller space, slip speed rails into brackets prior to installing.
Install all brackets by the top lag first.
Check to see if all are correctly spaced and level.
Install bottom lags.
Slip speed rails into brackets.
Set screw and internal locking splice of speed rail.
Attach clamps to the cameras.
Attach the clamps to the rail.
Here at OptiTrack, we recommend and provide Manfrotto clamps that have been tested and verified to ensure a solid hold on cameras and mounting structures. If you would like more information regarding Manfrotto clamps, please visit our page on our website or reach out to our .
Choosing an appropriate structure is critical in preparing the capture volume, and we recommend our customers consult our for planning a layout for the camera mount setup.
Consult with the truss system provider or our for setting up the truss system.
each camera.
each camera.
