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iris
Last modified: Tuesday, March 06, 2007 

On a digital camera iris is an adjustable aperture used to control the amount of light coming through the lens. The more the iris is opened, the more light it lets in and the brighter the scene will be. Camcorders may also have an iris that works in the the same way as one on a digital camera. However, as you adjust the iris you see the brightness change in the viewfinder.
Related Categories

Digital Cameras
Related Terms

aperture

camcorder

digital camera

digital photography

focal length

focal plane

focus ring

lens

optical viewfinder

shutter

shutter speed

zoom lens

zoom ring
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