Aperture

(Photo taken at F/2.8 Aperture)

(Photo taken at F/16 Aperture)

1. We should closely relate aperture to the pupil of a human eye.

2. The smaller the aperture, the larger the f-number. The larger the aperture, the smaller the f-number.

3. A smaller aperture results in a smaller depth of field. A larger aperture like F/16 or F/32 will result in a photograph with everything in focus (subject and background).