The Iris Diaphragm – Controlling Incoming Light

The variable aperture - the iris. A new definition for 'Diaphragm Iris' is in the photography glossary.
Click to visit the definition.

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 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 photographers.
See also: Editors ‘Bio’.

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