exposure meter![click to hear](/images/speaker.jpg)
Device with light-sensitive cells that measures the intensity of the light striking or reflected by the subject to determine the correct exposure for a photo.
film speed scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows the film’s sensitivity to light; it is expressed by the ISO or ASA number, where the higher the number, the more sensitive the film.
exposure-time scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows the length of time a film should be exposed to light, which is determined by the shutter speed.
exposure correction scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows changes made to exposure data when deliberately underexposing or overexposing a scene.
indicator needle ![click to hear](/images/speaker.jpg)
Thin metal bar that shows the brightness measured by light-sensitive cells on the exposure meter.
exposure value scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows the amount of light to which the film should be exposed.
calculator dial ![click to hear](/images/speaker.jpg)
Rotating dial that adjusts the film speed.
aperture scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows the diaphragm’s opening measured in f-stops (a high f-stop indicates a small opening).
cine scale ![click to hear](/images/speaker.jpg)
Graduated scale that shows the speed at which a motion picture film unwinds; it is expressed in frames per second.
light-reading scale ![click to hear](/images/speaker.jpg)
Graduated scale showing the intensity of the light striking or reflected by the subject.
diffuser ![click to hear](/images/speaker.jpg)
Translucent half globe used to measure the intensity of the light striking the subject to be photographed (incident light).