Definition of film speed in English:

film speed


  • 1Photography. The degree of light sensitivity of a photographic film; a numerical measure of this. In later use also: a numerical measure of the signal gain of the photosensor in a digital camera.

  • 2Cinematography. The speed at which a cinematographic film passes through a camera or projector.


Late 19th century. From film + speed.


film speed

/ˈfɪlm spiːd/