film speed
Noun
Meaning
English Wikipedia has an article on:film speedWikipedia
film speed (plural film speeds)
(photography) A measure of a film's sensitivity to light; faster films needing shorter exposures
Synonyms
Examples
In addition, coded notches cut into the Super 8 film cartridge exterior allow the camera to recognize the film speed automatically.
Thus Kodak could solve the problem of higher speed (greater light sensitivity—see film speed ) which required larger grain and therefore more " grainy " images.
The color temperature of a film stock is generally indicated next to the film speed number — e.g. 500T stock is color film stock with an ASA of 500 and balanced for tungsten light; 250D would have an ASA of 250 and be balanced for daylight.
However Todd-AO has six channels instead of the four of Cinemascope and due to the wider stripes and faster film speed provides superior audio quality.
Their work enabled the first quantitative measure of film speed to be devised.