Aperture

 Photography; Aperture

 Thin depth of field

 Medium depth of field

Broad depth of field

The above three images show an example of aperture. Aperture is the control of depth of field. This bascially controls how much of your photo is in focus and how much is not. Having a large number for the aperture, means a small depth of field. This means that less of the image is in focus. This is normally however the nearest thing to the camera, the main object and the background or anything else in the back will be blurred. This is the opposite for having more of the image in focus. So if the the aperture number is smaller, the larger the depth of field. Which means that majority of the image is all in focus. The aperture is controlled by changing the F number on the camera. The image above with a small depth of field used a F.3.5 which gave the blurred background; while the broad depth of field i used F.22. However for the broad depth of field to work you need a good lighting.