Definition: Diaphragm shutter

Definition: Diaphragm shutter | Glossary entry

Diaphragm shutter

A diaphragm shutter is an old type of shutter that was mounted on the Definition: Diaphragm; Iris diaphragm of a photographic lens or a similar diaphragm built for it. It is a legacy system that was not widely implemented in the SLR (film). It is not normally found in modern DSLRs or their modern lenses.

A diaphragm shutter is constructed from thin blades which briefly uncover the aperture to make the exposure. The blades slide over each other in a similar way to the iris and creates a circular aperture which rapidly enlarges to reveal the lens, stays open for the required time, then closes.

Comments, additions, amendments or ideas on this article? Contact Us


Damon Guy - Netkonnexion

Damon Guy (Netkonnexion)

Damon is a writer-photographer 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 courses ing digital photography.
See also: Editors ‘Bio’.
By Damon Guy see his profile on Google+.

find out more...Photokonnexion tips by email
If you enjoyed this article please sign up for our
daily email service.
                                                 Find out more