Guidelines for using CCTV camera lens in security monitoring

Some common sense about the use of CCTV camera lens in security monitoring

Common categories and basic purchase guide

There are two types of manual / automatic iris fixed focus lens and automatic iris zoom lens.

Fixed-focus lenses are divided into standard lenses (such as 4MM, 6MM, 8MM, 12MM) and wide-angle lenses (below 3.8MM)

The application of fixed focus lens:

Manual iris lens: The ambient illuminance to be monitored does not change much, such as indoors, if the room is wide, choose a lens with a small millimeter. . .

Automatic iris lens: the environment illumination to be monitored changes greatly, such as outdoor environment

Wide-angle lens: The monitoring angle is wider and the distance is closer.

Standard lens: The monitoring angle and distance are moderate.

Zoom lens: manual zoom and electric zoom (electric iris and auto iris).

It is best to choose a lens with glass lenses. One is that the light transmittance is better than the teaching, and the other is that the service life is longer than the resin lens (the resin lens is easily aging in the outdoor environment under light)