Photography school lesson 1: Exposure

ExposureExposure is the amount of light that hits your cameras sensor creating your picture. this amount of light can be controlled by three things:

Aperture:    the size of the opening of the lens when the picture is taken Shutter speed: the amount of time that the shutter is open ISO:    the sensitivity of the digital sensor (or film)

These three things always have to work together, as changing one will affect the others. Each of these three things also create their own individual aesthetic effect when altered.