In 1972, the U.S. proclaimed a contiguous zone extending from 3 to 12 miles offshore (Department of State Public Notice 358, 37 Fed. Reg. 11906 (June 15, 1972), consistent with the 1958 UN Convention on the Territorial Sea and Contiguous Zone.
The aperture of a lens is the opening in the diaphragm that controls how much light is allowed to reach your focal plane (film or sensor). The aperture is usually rated as a fraction of the focal length, hence the f/x.y nomenclature. The wider an aperture is, the more light it allows through, and the smaller the number under f/ is.
2. pupil-the contractile aperture in the center of the iris of the eye; resembles a large black dot. iris-muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye.aperture-a natural opening in something.he apparently black circular opening in the center of the iris of the eye, through which light passes to the retina. [Middle English, from Old French. , from Latin. , little doll, pupil of the eye (from the tiny image reflected in it) ; see pupil 1 .].