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MX Cameras

3-4 Vicon MX Hardware System Reference

application depends on various factors, including the field of view

(FOV), the aperture, and any lens filter fitted.

Important

Vicon Motion Systems has a policy of only using the best quality lenses with

its cameras. Should you need to change lenses, please refer to Vicon Motion

Systems or your nearest agent or distributor for advice.

A variety of C-mount lenses as well as SLR (Nikon Bayonet) lenses

are available for MX Cameras. For details on MX Camera lens

specifications, see Appendix D Technical Specifications.

Field of View

The most important factor in determining the lens to use with a

Vicon MX camera is the total area the camera can see using a given

lens. This is called the Field of View (FOV).

The scene that comprises the FOV has horizontal width (H) and

vertical height (V). Knowing the distance (L) between the camera and

a plane that defines the total FOV helps to select the type of lens to

meet a particular application.

Lenses are described in terms of their focal length (f), defined as the

distance in millimeters that the center of the lens must be from the

sensor plane surface to project a sharp image on the sensor. The focal

length of a lens is often given on the body of the lens or around the

surround of the glass element at the front of the lens as well as on

the lens documentation and packaging.

The focal length determines the angle of view (AOV) through the lens,

as shown in Figure 3-2.

Figure 3-2: Angle of View calculation

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Vicon IX 2000 L Technical Information Seite 40