In photography, light value has been used to refer to a `light level” for either incident or reflected light, often on a base-2 logarithmic scale. The term does not derive from a published standard, and has had several different meanings: In APEX, luminance value and incident light value are numerically equal, so that for a given `light valu...
Found on
http://en.wikipedia.org/wiki/Light_value
A reference to a fast acting, variable opening shutter to control the light intensity in printing film. (Laboratory)
Found on
http://www.filmland.com/glossary/Dictionary.html#A
No exact match found.
