Cultures all over the world incorporate cumin into their cuisine, and it's often mixed with other spices for curry and taco seasoning. These recipes show how cumin's earthy flavor enriches everything from guacamole to vegetables to meat.
As with the shutter speed, the aperture also affects the sharpness of your picture, but in a different way. Changing the aperture changes the depth of field, the depth in a scene from foreground to background that will be sharp in a photograph.
Part of this has to do with light levels: with a bright display (white background) the iris closes a bit more, decreasing the effect of the deformed lens; with a dark display (black background) the iris opens to receive more light and the deformation of the lens creates a much fuzzier focus at the eye..