ISO 320/Light meter

A light meter (or illuminometer) is a device used to measure the amount of light. In photography, an exposure meter is a light meter coupled to either

film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system introduced in 1974

Sekonic light meters are available on the Sekonic web site under "Products". The metering range for an incident-light meter specified in EV at ISO 100 usually

for Standardization (ISO) standards and other deliverables. For a complete and up-to-date list of all the ISO standards, see the ISO catalogue. The standards

exposures. Common film speeds for tungsten-balanced slide film are ISO 64, 160, and 320. Cinestill 800t Kodak 500t Ektachrome 64T Hedgecoe, John. The New