Determine the correct exposure: Aperture explained simply!

The variably adjustable opening in the lens through which light reaches the camera sensor—this is the aperture! The aperture is a crucial component of various camera settings that control the amount of light entering your camera and ultimately shape the final image.

The wider the aperture is open, the more light reaches the sensor, resulting in a brighter image. Conversely, if the aperture is narrowed, the amount of light is reduced, making the image darker. This fundamental rule significantly affects the exposure of your photo. Aside from the aperture, achieving a correctly exposed shot requires balancing other settings as well: the so-called "exposure triangle" between aperture, ISO, and shutter speed.

How is an aperture constructed, and how does it work?

Behind the exterior of every lens lies a sophisticated mechanism: A diaphragm, often consisting of multiple metal blades, forms the aperture opening. Adjusting these blades changes the size of the opening. The different settings you can choose from are referred to as aperture stops, also known as F-stops. A low f-number, such as f/1.4 or f/2.0, represents a larger opening that allows more light to pass through, whereas a high f-number, like f/11 or f/16, reduces the opening and thus decreases the amount of light.

Mastering the aperture is essential to unlocking the full creative potential of your camera. By finding the right balance between aperture, shutter speed, and ISO, you can optimally control the exposure of your images and achieve stunning photographs. Dive deeper into the topic and experiment with different settings—you'll quickly develop an instinct for the right exposure.

This article was written by Marlena Brill.