Reciprocity law

Reciprocity law
States that exposure = intensity x time, where intensity is equal to the amount of light and time is equal to the time that amount of light is allowed to act upon the photographic emulsion.
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Reciprocity law
Techniques Glossary Reciprocity law
To make an exposure, a photographer can, for example, choose a combination of a small aperture and a slow shutter speed or a large aperture and a fast shutter speed.

Reciprocity Law
Reciprocity Law is a photographic rule or law in which photographic exposure is a function of both light intensity and exposure time. If you double one, then you need to reduce the other by half to achieve the same exposure.

reciprocity law
photographic rule stating that exposure is a function of the product of both exposure time and light intensity, not of either variable alone.

Reciprocity law failure. Normally the effect of dim light, or small lens aperture, can be counteracted by giving a long exposure time.

Reciprocity Law (Exposure)
Exposure = Intensity x Time. When you cut either the intensity or the time (shutter speed) in half you have only to double the other to keep your meter happy, up and down the exposure scale, except at the far ends, ...

RECIPROCITY LAW - The reciprocity law states that Exposure = Intensity X Time. "Intensity" is the amount of light, and "Time" refers to how long that amount of light is allowed to act on the film's emulsion.

The reciprocity law specifies the total exposure, but the response of a photographic material to a constant total exposure may not remain constant for very long exposures in very faint light, or very short exposures in very bright light.

RECIPROCITY LAW-Exposure is equal to the intensity of the exposing light multiplied by the time during which it acts.

Reciprocity law: It states that the exposure equals intensity multiplied by duration. This rule fails with very low or high intensities of light.
Reflected light reading: A measurement of light reflected from the subject.

refers to the inverse relationship between the intensity and duration of light that determines exposure of light-sensitive material. Within a normal exposure range for film stock, for example, the reciprocity law states that exposure = intensity Ã- ...

See also: Light, Reciprocity, Photograph, Exposure, Camera