The (Camera) lens opening that controls the amount of light that reaches the image sensor. Aperture is expressed as F-stop

A device in the camera lens that self-adjusts to light level changes. The Iris opens and closes to control the amount of light passing through the lens to reach the image sensor.

A feature of cameras that enhances videos of low lights to maintain the output video signal strength.

A feature of cameras that automatically adjusts to varying light conditions to maintain the correct white balance on the image. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light. For more detail, click here More Detail

AWG is the U.S. standard measuring gauge for certain conductors, including copper. The higher the AWG number the thinner the wire. This measure stems from the fact that the original measurement represented the number of times the wire was run through a wire machine which thus reduced the diameter of the wire. More Detail

The term bit rate

Cameras with BLC feature will adjust the brightness level of the image to compensate for the bright background so that more detail of the dark objects can be seen. For an example, when a camera is directed toward a door, the bright light from outside will normally make the overall image too bright to show detail on a subject backing to the door. BL [..]

CCD and CMOS are two main types of technology in current security cameras. CCDs containing grids of pixels are used in Digital camera, Image scanner and video cameras as light-sensing devices.

Committée Consultatif International des Radiocommuniqué, which is the European standardization body that has set the standards for television in Europe. It was initially monochrome; therefore, today the term CCIR is usually used to refer to monochrome cameras that are used in PAL countries. More Detail

A system in which the circuit is closed and all the elements are directly connected. The most widely applications of CCTV are in the security industry. More Detail