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.
Aperture vs F-Stop. When it comes to photography, there are many jargons used that might seem overwhelming to a beginner. Aperture and F-stop are among these two terms. Whatâs more confusing is that many people use these two terms interchangeably. Technically, aperture is the size of the hole that lets light in. In cameras, this is the diameter to which your diaphragm opens up to.