Week 1 Vocabulary: aperture, shutter speed, ISO

Aperture: a space through which light passes in an optical or photographic instrument, especially the opening by light enters a camera.

Shutter Speed: the amount of time a camera's shutter is open when taking a photo. The slower the shutter speed, the longer the exposure time. 

ISO: the ISO speed controls the sensitivity of the film or the sensor that absorbs the light. The higher the ISO speed, the more sensitive the film or sensor is to light.