|Horizontal AOV:||2 x Tan-1 (18.43/(2 * 18)) = 54.22°|
|Vertical AOV:||2 x Tan-1 (18.43/(2 * 18)) = 54.22°|
|Horizontal FOV at 9m:||0.0183 x (9/0.018) = 9.15 m|
|Vertical FOV at 9m:||0.0183 x (9/0.018) = 9.15 m|
These formulae take into account only the optical components of the camera and lens, thus they calculate the maximum possible theoretical Field of View from this combination. Poor illumination of the volume by camera strobes, less than optimal aperture or gain settings, or poor marker surface quality might all reduce the FOV in which a camera can recognize a marker below this maximum theoretical level.
When using these formulae, note that for frame rates above the full-resolution rates given for Vantage cameras in Vicon Vantage camera performance comparison, the sensor area is reduced due to windowing, as described in Field of View.
To optimize the performance of the Vantage cameras, each lens is fitted with an optical filter that attenuates wavelengths of light other than the narrow passband required to pass the light emitted by the light-emitting diodes (LEDs) from the Vantage strobe unit and reflected back from the markers to the camera.
When the cameras are used outdoors, try to position the cameras to minimize the ambient light as the filter cannot distinguish ambient light of the same wavelength as that of the strobe.