Notice that the moving person is not blurry and that the lens let less light in
Example of Using a Slow Shutter Speed
Notice that the image is more blurry and the lens captured more light
Example of Using the Minimum Aperture
Notice that the enlarged lens opening captured lots of light
Example of Using the Average Aperture
Because the lens opening became smaller, less light was captured
Example of Using the Maximum Aperture
Notice that the small lens opening captured barely any light, thereby producing a very dark image
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