Aperture is perhaps the most important — and also the most confusing — photographic concept to grasp. Mastering the use of aperture opens up a range of artistic possibilities and brings your photography to the next level. First, though, you have to ...

The aperture is made up of mechanical blades that increases or decreases in size depending on the aperture you select. In humans, the iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.