An aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. It is calibrated in f/stops and is generally written as numbers such as 1.4, 2, 2.8, 4, 5.6, 8, 11 and 16.

Depth of field is the distance between the closest and farthest objects in a photo that appears acceptably sharp. Now your camera can only focus sharply at one point. But the transition from sharp to unsharp is gradual.
The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.

My Outcomes:

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Favorite Outcome:

To create this image, I set my camera setting to AV and adjusted it to F stop setting 4. This is my favorite outcome out of my collection as it is an example of a shallow depth of field as it is focusing on the object as the main aspect in the image, drawing the viewers attention to the center. In addition, the object is portrayed as sharp and crisp and the dark tones of it also contributes to this.