Camera Settings

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwi7iZSx1MvdAhUDgRoKHStxDiAQjRx6BAgBEAU&url=https%3A%2F%2Fwww.quora.com%2FWhat-is-the-meaning-of-F4-5-6-in-a-specification-of-a-lens&psig=AOvVaw0B9s_1iQMZGiPNfJH6lCLo&ust=1537604255630057

This diagram shows what Aperture is, so its the opening of a camera or something, it allows light to come through the lens. The smallest f-stop the light will be more exposed.

How Aperture affects the depth of visual field.

This is how it looks when the light is more exposed. you see things in the photo more visually, when the lens is smaller, the less you will see, but if the lens is much bigger then you should be able to able much more.

https://www.google.com/search?safe=strict&hl=en-GB&q=nikon+70+200+vr+ii&tbm=isch&tbs=simg:CAQSlwEJ2BAe-972LAwaiwELEKjU2AQaBAgVCAIMCxCwjKcIGmIKYAgDEiikEbgcthy8F8UetxygF-4LthekF9EmxCbSJtc8ijOnIdk82jyBM9g8GjA2WfIjn7cWbIZR360YWy3EntLjlr51jF6TLj-0YWu_1lVHji3aNoIyjtPEskGxKO2kgBAwLEI6u_1ggaCgoICAESBDNqauUM&sa=X&ved=0ahUKEwiAjvGr4MvdAhVCp4sKHUX_DNsQwg4ILygA

ISO Aperture

This picture is with help of ISO and Aperture, it defines the image better with a bigger aperture range, so the bigger the better, and the smaller it becomes more blurry. The ISO is the sensitivity of the sensor. ISO stands for International Standards Organisation.