aperture

11 ENTRIES FOUND:

ap·er·ture

noun \ˈap-ə(r)-ˌchr, -chər, -ˌtyr, -ˌtr\

: a hole or small opening in something

: an opening that controls the amount of light that passes through a lens (such as a camera lens)

Full Definition of APERTURE

1
:  an opening or open space :  hole
2
a :  the opening in a photographic lens that admits the light
b :  the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument
c :  the diameter of the objective lens or mirror of a telescope

Examples of APERTURE

  1. We entered the cave through a narrow aperture.
  2. The photograph was taken using a fast shutter speed and a large aperture.

Origin of APERTURE

Middle English, from Latin apertura, from apertus, past participle of aperire to open
First Known Use: 15th century

Other Pictures (on film) Terms

daguerreotype, emulsion, fill, sepia, still, stop

ap·er·ture

noun \ˈap-ə(r)-ˌch(ə)r, -chər, -ˌt(y)(ə)r\   (Medical Dictionary)

Medical Definition of APERTURE

1
: an opening or open space
2
: the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument

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