Difference between revisions of "Exposure"
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| − | *Date: [ | + | *Date: [https://www.wikipedia.org/wiki/17th_Century 1605]] |
==Definitions== | ==Definitions== | ||
*1 : the [[fact]] or condition of being exposed: as a : the condition of [[being]] presented to [[view]] or made known <a [[politician]] seeks a lot of exposure> | *1 : the [[fact]] or condition of being exposed: as a : the condition of [[being]] presented to [[view]] or made known <a [[politician]] seeks a lot of exposure> | ||
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*4 : a piece or section of [[sensitized]] [[material]] (as film) on which an exposure is or can be made <36 exposures per roll> | *4 : a piece or section of [[sensitized]] [[material]] (as film) on which an exposure is or can be made <36 exposures per roll> | ||
==Description== | ==Description== | ||
| − | In photography, '''exposure''' is the [[total]] amount of [[light]] allowed to fall on the photographic [[medium]] ([ | + | In photography, '''exposure''' is the [[total]] amount of [[light]] allowed to fall on the photographic [[medium]] ([https://en.wikipedia.org/wiki/Photographic_film photographic film] or image sensor) during the [[process]] of taking a photograph. Exposure is [[measured]] in [https://en.wikipedia.org/wiki/Lux lux] seconds, and can be computed from [https://en.wikipedia.org/wiki/Exposure_value exposure value] (EV) and scene [https://en.wikipedia.org/wiki/Luminance luminance] over a specified area. |
| − | In photographic jargon, an exposure generally refers to a single [ | + | In photographic jargon, an exposure generally refers to a single [https://en.wikipedia.org/wiki/Shutter_cycle shutter cycle]. For example: a long exposure refers to a single, protracted shutter [[cycle]] to capture enough low-[[intensity]] [[light]], whereas a multiple exposure involves a series of [[relatively]] brief shutter cycles; effectively layering a series of photographs in one image. For the same [https://en.wikipedia.org/wiki/Film_speed film speed], the accumulated photometric exposure (H) should be similar in both cases.[https://en.wikipedia.org/wiki/Exposure_%28photography%29] |
[[Category: Photography]] | [[Category: Photography]] | ||
Latest revision as of 23:56, 12 December 2020
- Date: 1605]
Definitions
- 1 : the fact or condition of being exposed: as a : the condition of being presented to view or made known <a politician seeks a lot of exposure>
- b : the condition of being unprotected especially from severe weather <died of exposure>
- c : the condition of being subject to some effect or influence <risk exposure to the flu>
- d : the condition of being at risk of financial loss <minimizes your exposure to market fluctuations>; also : an amount at risk
- 2 : the act or an instance of exposing: as a : disclosure of something secret <tried to prevent exposure of their past>
- b : the treating of sensitized material (as film) to controlled amounts of radiant energy; also : the amount of such energy or length of such treatment <a 3-second exposure>
- 3 a : the manner of being exposed
- b : the position (as of a house) with respect to weather influences or compass points <a room with a southern exposure>
- 4 : a piece or section of sensitized material (as film) on which an exposure is or can be made <36 exposures per roll>
Description
In photography, exposure is the total amount of light allowed to fall on the photographic medium (photographic film or image sensor) during the process of taking a photograph. Exposure is measured in lux seconds, and can be computed from exposure value (EV) and scene luminance over a specified area.
In photographic jargon, an exposure generally refers to a single shutter cycle. For example: a long exposure refers to a single, protracted shutter cycle to capture enough low-intensity light, whereas a multiple exposure involves a series of relatively brief shutter cycles; effectively layering a series of photographs in one image. For the same film speed, the accumulated photometric exposure (H) should be similar in both cases.[1]
