Lens are the
most important component of CCTV Cameras, typical lens varied with
Focal Length, Aperture and Angle of the Field of view. Selecting the
appropriate lens is the critical step in constructing a complete
Focal Length and Angle
of the Field of View
Lens with a shorter
focal length monitor a nearer object more clear than that with
longer focal length. In contrast, lens with longer focal length can
take a more distinct image than that with shorter focal length.
However, the angle of the Field of View is greater with a short
focal length and will show a wider picture. The angle of the Field
of View is smaller with a long focal length and will show a narrower
picture. Here are the example of lens with different focal length.
Adjustment of Aperture
As CCTV Lens do not like human eyes, they need appropriate aperture
size to take optimum light level for the exposure of image. There
are three kinds of lens available: Fixed Manual monofocal lens,
Manual monofocal lens, and Auto iris monofocal lens.
Basic CCTV Lens
Specifications are subject to change without