Meaning of A LENS THAT ADJUSTS AUTOMATICALLY TO ALLOW THE RIGHT AMOUNT OF LIGHT TO in English

A LENS THAT ADJUSTS AUTOMATICALLY TO ALLOW THE RIGHT AMOUNT OF LIGHT TO

fall on the imaging device. There is a tiny motor and amplifier built in which receives a control signal from the camera to maintain a constant one volt peak to peak (1.0 Vp-p) video level.

Film and video English vocabulary.      Английский словарь фильмов и видео.