The Iris Diaphragm – Controlling Incoming Light

The variable aperture - the iris.

The variable aperture - the iris. A new definition for 'Diaphragm Iris' is in the photography glossary.
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The light coming into your camera is controlled by the iris

The aperture size regulates the amount of light that you allow into your camera while taking a picture. However, it is the ‘Iris Diaphragm’ mechanism that controls the aperture size. It is a sophisticated mechanism in today’s cameras. In former times the diaphragm was a component of the lens in its own right. Today the iris and the diaphragm are one mechanism which together control aperture size .

The new entry in the Photographic Glossary: Diaphragm; Iris Diaphragm; Iris

By Damon Guy (author and Photokonnexion editor)

Damon Guy - Netkonnexion

Damon Guy (Netkonnexion)

Damon is a writer-photog and editor of this site. He has run some major websites, a computing department and a digital image library. He started out as a trained teacher and now runs training for digital photogs.
See also: Editors ‘Bio’.
By Damon Guy see his profile on Google+.

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