Candle meter

Candle meter
Also known as a lux and defined as the illumination measured on a surface at a distance of one meter from a light source of one international candle power.

-Candle meter second - unit of illumination related to exposure time, more often referred to as one lux-second.
-Capacitor - device that builds and stores electrical charges. Used in electronic flash and some forms of electronic shutters.

See also: Printing frame, Simple lens, Contour, Development, Plate