F-Stop

F-stop is basically the control of your photo. When you are taking a picture, and you focus on something,you could control if you want blur in the background, or if you want it to be not so blurry. The f-stop number is determined by the focal length of the lens divided by the diameter of the aperture. Field of view is the width and the height of the area that the lens can capture. So if you go lower it decreases the aperture, and if you go higher it increases the aperture.