| 释义 |
reciprocity failure
reciprocity failure n (Photography) photog a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values Translations
reciprocity failure
reciprocity failure (res-ă-pross -ă-tee) See photographic emulsion.reciprocity failure[‚res·ə′präs·əd·ē ‚fāl·yər] (graphic arts) A phenomenon wherein the usual combination of light intensity and exposure time (following the reciprocity law) required to produce a specified density in a photographic emulsion changes due to especially long exposure time or low light intensity. |