AF
Updated: 01/18/2023 by Computer Hope
AF may refer to any of the following:
1. Short for Autofocus, AF is an a sensor, a control system, and a motor that focuses automatically or on a manually selected point or area. The AF speed is highly dependent on the maximum aperture offered by the lens. F-stops of around f/2 to f/2.8 are usually considered optimal in terms of accuracy and focusing speed. Faster lenses than this (e.g.: f/1.4 or f/1.8) normally have very low depth of field, meaning that it takes longer to achieve correct focus, despite the increased amount of light.
2. The Internet domain suffix .af is short for Afghanistan.