Shutter Speed and Aperature

In this assignment I learned about shutter speed and aperture and that the key to any picture is light. The shutter is the mechanism that lets light through the lens and it controls the duration of time in which the picture is captured. Shutter Speed is expressed in seconds or fractions of a second. A faster shutter speed  like 1/1000 produces stop-action shots while a slow shutter speed (2 seconds) produces blurry shots. Aperature is like the pupil of your eye because by closing it, it restricts light and by opening it, it allows more light in. This is measured in F-stops and a large aperture is expressed by a small F-stop number (2.8) and has a small depth of field and a fast shutter speed. A small aperture is expressed by a large F-stop (22) and has a large depth of field and a slow shutter speed.