You will get the information on the link below .
Auto iris or auto iris diaphragm is the mechanism that automatically adjusts the lens opening .
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What is an Auto Iris?
It adjusts to the different levels of brightness in an environment. This auto iris opens and closes the lens iris as the light changes. It can also stop the camera from being damaged by very bright sunlight. You can find more CCTV definitions in http://www.video-surveillance-guide.com/... .
Reply:An auto iris lens is a camera lens of which the iris changes automatically according to the changes of the light conditions. Auto iris lenses are powered through cameras power supply.
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