AF (Autofocus)
From Nikonians Wiki - FAQs, Photo Glossary, Good Photo Locations, Help
When applied to a lens, it is the ability of a lens to focus automatically on an object within its focusing sensors. AF Nikkor lenses were introduced in 1986. When on Auto bodies, there is no need to use the aperture ring in auto modes. They are AI-S lenses with a built-in CPU and motor for AF operation. When applied to a camera it means it is equipped with autofocus capability (a CAM module) to perform with an autofocus lens.
