You have a "real" camera, with an adjustable lens aperture and an adjustable shutter speed. If you rotate the ring on the lens to make the f-number of the lens larger what else do you affect, and how?
1. You will need to take a shorter exposure, and you will have a shallower depth of field around the object you are focusing on.
2. You will make the field of view larger, and the need exposure time will be unaffected.
3. You will need to make a longer exposure, and you will have a deeper depth of field around the object you are focusing on.