In photography. The aperture stop of a photographic lens can be adjusted to control the amount of light reaching the film or image sensor. In combination with variation of shutter speed, the aperture size will regulate the film’s or image sensor’s degree of exposure to light. The higher the aperture the more you will be able to view everything in frame. A lower aperture will allow for more focus on a certain part of what is in focus.
I experimented using a 18-55 mm lens, a 75-300 mm lens and different aperture levels. Here are some examples of my experimentation,
These were taken using the 75-300 mm lens, with a high aperture.
The following were taken with a low aperture of 5.6 and the smaller lens. 
