The Nikon F-Mount was launched with the Nikon F camera in 1959 and has remained virtually unchanged since, making it the only lens mount still in production over 5 decades after its introduction. The camera mount comes essentially in 3 flavors: F, AI-S and AF, with some minor adaptations for particular cameras, mostly the digital entry-level models, which feature 2 extra screws and the minimum aperture confirmation notch, discussed later on.
Can I use manual focus lenses on my Nikon DSLR? Yes, you can! Virtually all Nikkor lenses produced since the introduction of AI in 1977 can be mounted and used on virtually all Nikon cameras produced since 1977.