In the world of computer generated cartoons and images, we have a very awesome trick we can do which cannot be done in real life. We can have unlimited Depth of Field. If you aren’t a photographer or involved in filming, you probably have no idea what that means. Well, in real life lenses cannot have everything in perfect focus from the front of the scene to the back. This is controlled by the f-stop. The bigger the f-stop, the more everything is in focus from front to back, the bigger the depth of field. Although, the f-stop is expressed as a fraction, so technically it is smaller numbers that are in higher focus. For example, f/2.8 will have your main character in focus and the rest of the background blurry. This is very useful in photography to force the viewer to focus primarily on your subject while having the background just provide some color. For a landscape image, a photographer may use f/11 to make sure that a large portion of the image is in focus.