Aperture is how much light is being let into the camera, the larger the f/ number is the less light the camera is letting in , meaning you are able to focus more things in the image. If the aperture is a smaller number you will be able to focus on a smaller subject Aperture is one of the three pillars of photography the other 2 being shutter speed and ISO. It allows more or less light into the camera sensor, it adds dimension to photos by controlling the depth of field giving you a blurred background with a shallow focus effect. Aperture also alters the exposure of the photo by changing the brightness of the photo.
Depth of field
Depth of field is how much your image focuses s the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera.
