Any inherent deficiency of a lens or optical system which is responsible for imperfections in shape or sharpness of the image.

Automatic Gain Control, an electronic circuit that amplifies the video signal when the strength of the signal falls below a given value.

Automatic Light Compensation. Photometric control, measures light intensity. Determines the iris reaction sensitivity. Sensitivity is increased when the potentiometer is turned towards PEAK, and decre [..]

May be expressed in Diagonal, Horizontal or, Vertical. Smaller focal lengths give a wider angle of view.

The opening of the lens which controls the amount of light reaching the surface of the pickup device. The size of the aperture is controlled by the iris adjustment.

A lens which one or more of the elements have a non-spherical surface. Aspherical surfaces are shaped to reduce the spherical and other aberrations.

A lens with a electronically controlled iris. This allows the lens to maintain one light level throughout varying light conditions.

Back focus is a term used to describe the relationship of the distance of the lens to the image device. This distance is critical to maintain the proper depth of field through changing focal lengths a [..]

Back light compensation. A function of the camera that compensates for excessive light directed at the camera causing the video to bloom or causing the images in front of the light to be unusable.

An industry standard for mounting a lens to a camera where a 1" x 32 thread is employed and the distance from the image plane is 17.52mm from the shoulder of the lens. A C-mount lens may be used [..]