The ability to view a camera image that is located remotely, where the video image is transmitted over a phone line or the Internet.

A special camera lens with the ability to open or close its iris automatically in response to changing light levels.

A special camera lens with the ability to open or close its iris automatically in response to changing light levels.

The ability of a digital security camera to adjust for bright background lighting that would normally cause the subject to appear too dark.

A type of camera lens mount that enables different lenses to be swapped out and used on a security camera.

The light-sensitive imaging microchip found in digital security cameras.

A special computer that converts analog computer images to digital images, compresses the images, and then stores them for later viewing. A DVR replaces the time-lapse VCR, multiplexor and switch found in analog CCTV surveillance systems.

An electronic device used to record and display camera images at the same time. A full-duplex DVR can record camera images while displaying images from a different camera at the same time.

Protective enclosure that a camera can be placed in to protect it from outside weather conditions.

Unit of measure of light sensitivity for a camera. Sensitive cameras can operate with low levels of lux.