What is another word for exposure time?
Pronunciation: [ɛkspˈə͡ʊʒə tˈa͡ɪm] (IPA) 
Exposure time is the duration of time that a camera's shutter remains open, allowing light to enter and expose the camera's image sensor or film. There are several synonyms for the expression "exposure time," including "shutter speed," "exposure length," or "exposure duration." Shutter speed describes how long the camera shutter remains open, typically measured in fractions of a second or whole seconds. Exposure length and exposure duration describe the amount of time that the camera's sensor or film is exposed to light, expressed in seconds or fractions of seconds. These synonyms are all used interchangeably to describe the amount of time that the camera takes to capture an image.
