The aperture for a lens is the size of the gap allowing light in on the photograph.  A lower aperture means a bigger shutter size giving the effect of an increased blur in the depth of field.  A higher aperture is a small shutter size resulting in a more precised and detailed photograph in total.

In my experiment I adjusted the aperture from f5, f10, f15, f20, f25 and f30.  I demonstrated how the depth of field is affected by the size of the shutter size resulting in a more leveled style of blurriness behind the person.  By using this technique, we can create a more personnel and intimate style of photograph where we focus on the desired point easier.