Aperture/Depth of Field
Shallow depth of field is when one item is in focus. My first picture shows this well. The goggles in the front are so in focus, you can even see the finger smudges on the lens. The f stop I used was 1.8. The ISO was 1600 and the white balance was warm-white fluorescent. The camera was set to manual, so I could choose want I wanted to be in focus and what I didn't want to be in focus.
The fourth picture is a large depth of field. This image has many different types of shells at different depths. The f-stop I used was 32. The ISO was at 500 and the white balance was at 2 warm-white fluorescent. The camera was set to manual, so I could experiment with focusing everything in the image. The rule of thirds was incorporated when taking this picture because I didn't center anything. I made sure the shells were off set, so the rule of thirds would apply.
Both images are good quality and show large or shallow depth of field. The one with the shells is a very sharp image that has everything in focus. The shadows that the lighting has created shows the depth of field in the picture. Although this image is clear and in focus, I like the picture with the goggles better. The goggles are really in focus and show details on the goggles. It is so clear you can see the smudges from people's fingers, which is really cool. Shallow depth of field would be used when you want to focus on one thing, where as large depth of field would be used to give more of a background as to where you are.