What is aperture?
The aperture refers to the size of the opening in the lens through which the light enters the camera. The size of this opening can be adjusted and the aperture size is measured in f-stops. The image on the right shows you exactly what the aperture on a lens looks like.
When you change the f-stop value, you change the size of the opening. Here’s the weird thing though. The higher the f-stop, the smaller the opening.
The aperture is built inside each lens and it controls the light entering a camera. It’s a lot like the shades on a window control the light. Charles Bryant created a great video clip that will teach you the basic principles of aperture.
