Word Definitions

Aperture: Is a device that controls how much light is admitted through an opening. In photography and digital photography aperture is the unit of measurement that chooses of the size of the opening in the lens. The size of aperture is measured by F-stop.

Depth of Field: The distance between the nearest object and the furthest object that appear on the image to be acceptably sharp, however the lens can only focus on one distance at a time. 

Exposure: It's the unit of measurement of light allowed to reach the electronic sensor during the process of taking the picture. 

Framing: Is when an object as as a frame to your focusing object. 

Composition: