Taken from Foto Footsteps:
In this small guide series I am going to help unravel the mystery that surrounds the understanding of exposure in photography. People new to photography will hear the term “exposure” and see all the settings on their camera and be baffled by what the numbers mean. This then leads them to putting their camera into auto shooting mode without exploring and unlocking the cameras true potential. If this sounds like you, hopefully this guide will help you gain an understanding of exposure and how mastering exposure will help lead you to taking better and more creative photos.
What is exposure?
In a nutshell an exposure is in fact another term for a photograph or to be precise the amount of light used to create a photograph. To create a photograph you expose the film or digital sensor to light which in turn creates the photograph. The amount of light that enters the camera determines the exposure. If you allow too much light to enter then the photo will be over exposed (too bright) and if you don’t let in enough light the picture will be under exposed (too dark). Therefore once you have an understanding of exposure you will in fact know how much light will be required to create a perfectly exposed photo.