exposure latitude

Definition: Range of variation of exposure on film which produces no significant effect on image quality or required results.
It all depends on give-and-take
Exposure latitude is a stretchable commodity: film manufacturers and their kin prefer to think of their products having large latitude when the fact is that the extent of latitude depends inversely on the quality standards to which the photographer is working: high standards greatly reduce latitude. The other main factors which reduce latitude are high contrast of material or in subject luminance. In practice, take my advice and forget it: latitude does not exist. Just expose as accurately as your equipment allows (which these days is pretty accurate).

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