AF
Autofocus is a function that was initially introduced on cameras in the late 1970s. It is a function in which the lens is changed automatically to bring a predetermined region of the image into fine focus. The term "autofocus" stands for this function. Many contemporary lenses designed for digital SLR cameras come equipped with autofocus (AF), which can be accomplished by utilizing one or more sensors and a motor that are either built into the lens itself or into the body of the camera.
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