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.
A lens that automatically adjusts to allow the correct amount of light to fall on the imaging device. There are a tiny motor and amplifier built in which generally receives a control signal from the camera to maintain a constant one volt peak to peak (pp) video level. There are two manual controls on the lens to allow compensation for varying conditions of 'peak' and 'average' light.
An electronic circuit fitted to the iris of a lens to help compensate for large changes in light levels. This type of lens is recommended for use where there are low light or changing light conditions, for example external use. An Auto Iris lens adjusts the aperture automatically dependent on the light level, very much like the human eye.
This is the lens ‘metal leaf' diaphragm, which works in conjunction with the shutter release. The diaphragm is closed prior to the shutter opening and returns to the fully open position when the shutter closes.
lens diaphragm which is controlled by a mechanism in the camera body coupled to the shutter release.
A device for automatic exposure control that adjusts lens iris size (aperture) usually via a motor driven diaphragm and in response to changing video signal level. Video Drive type samples the composite video output signal and has an inbuit amplifier usually with adjustable Level and Peak-Average metering potentiometers. DC Drive type has Motor and Damping Coil inputs for use with cameras that have an inbuilt amplifier.[ goto Top of Page
A diaphragm device in the lens that adjusts to light level changes. The iris diaphragm opens or closes the aperture to control the amount of lights coming through the lens.