iris diaphragm

n. A circular device with a variable diameter, commonly used on cameras to regulate the amount of light admitted to a lens.

iris diaphragm

n (Photography) an adjustable diaphragm that regulates the amount of light entering an optical instrument, esp a camera. It usually consists of a number of thin metal leaves arranged so that they open out into an approximately circular aperture. Sometimes shortened to: iris

i′ris di`aphragm

n. a composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system. [1885–90]

Thesaurus

Noun

iris diaphragm - diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central openingirisdiaphragm, stop - a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"

Translations

diaframma ad iride

Iris Diaphragm

iris diaphragm

[′ī·rəs ′dī·ə‚fram] (anatomy) iris

Iris Diaphragm

a type of stop that is often used in photographic lenses and other instruments to adjust the brightness of the image and to vary the depth of field. It consists of thin, opaque, crescent-shaped vanes that overlap one another, thus forming an approximately circular opening. By moving the stop ring on the lens or a lever connected to it, all the vanes are turned simultaneously, so that the objective’s opening (aperture ratio) is varied smoothly.

iris diaphragm

iris diaphragm

iris diaphragm

i′ris di`aphragm

Iris Diaphragm

iris diaphragm

Iris Diaphragm

iris diaphragm

Synonyms for iris diaphragm

noun diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening

Synonyms

Related Words