Hi! If you're new to photography, you're probably trying to learn a theory just because you don't know where to start. In this article I will explain what the aperture and diaphragm are, and in the next 3 articles I will tell you about ISO, shutter speed and exposure triangle (how to harmonize these 3 basic pillars of photography). Let's begin! What is the aperture? The aperture is, technically, the hole through which light passes to the sensor of the device. Basically, the aperture controls how accentuated the bokeh effect (blur) is and/or if it exists. Most of the time you will hear photographers telling you, "Shrink the aperture a little!" Instead of "Shrink the diaphragm a little!" In principle, these two do the same thing. What is the aperture and diaphragm? The diaphragm is the one that controls the amount of light that enters through the lens. It is made up of blades and works on the same principle as the iris (when there is a lot of light, t...