exposure

ik-SPOH-zher /ɪkˈspoʊʒər/
nounB2SATACTTOEFLIELTS
generaltechnical

The total amount of light allowed to fall on the photographic medium (sensor or film) during the process of taking a photograph.

Can refer to the physical act of letting light hit the sensor, the specific combination of settings used, or the resulting image itself.

The story behind the word. The word 'exposure' comes from the Latin 'exponere', meaning 'to put out' or 'expose to view'. In early photography, glass plates coated with light-sensitive chemicals had to be physically 'placed out' in front of the lens's light path to receive the image, a literal 'exposure' to the elements.

Word relationships

  • illumination: 'Illumination' refers to the light shining on a subject, while 'exposure' refers to the light actually captured by the camera sensor.
  • underexposure: 'Underexposure' is a specific state of capturing too little light, whereas 'exposure' is the general concept of capturing light.

Commonly confused with

  • brightness: Brightness is a subjective perception of light intensity, while exposure is the objective physical measurement of light energy reaching a sensor.

Word family

  • expose (verb): To subject a sensitive photographic surface to light.
  • exposed (adjective): Left unprotected or subjected to light.

Collocations

  • long exposure
  • double exposure
  • exposure time
  • correct exposure

Example sentences

  • "The long exposure captured the movement of the clouds, turning them into soft, painterly streaks." A critique of a landscape photograph taken at dusk.

Memory hook

To expose a secret is to lay it out in the open light. A camera exposure lays the sensor open to the light. Exposing the sensor to light.

When not to use

Do not use 'exposure' to mean simply 'brightness' in a general sense, as exposure is the result of a specific physical process.

Fun facts

  • The longest single photographic exposure ever recorded took eight years and one month, captured using a pinhole camera made from a beer can lined with photographic paper.
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