Definition of reciprocity failure in English:

reciprocity failure

Line breaks: reci|procity fail|ure

noun

[mass noun] Photography
  • Deviation of an emulsion from the principle that the degree of darkening is constant for a given product of light intensity and exposure time, typically at very low or very high light intensities.
    More example sentences
    • The next fact is that you also do not need to know anything about shutter speeds, zoom lenses, reciprocity failure or the like.
    • Now if you have read about time exposures you will have come across the phrase ‘reciprocity failure’ with long time exposures.
    • Those of you who have read books and magazines will have read about ‘reciprocity failure’ with long time exposures.

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