My first picture has a small aperture because there is a small blur to it. My image of the paper clips i used a large aperture and made a large blur to it. The number was all the way for the large aperture and it was set low for the small aperture. I am not the entirely sure what the exact numbers on the camera was used. I think my first photo was better because the blur was not as severe. With the shallow depth of field it does not blur everything. With a large depth of field it blurs the things that are too far away. when you want to take a picture of a long far away object.