Nikon is celebrating the 50th birthday of its F-mount lens-mounting system.

Featured on the company's SLR cameras and Nikkor lenses, the F-mount is the longest standing lens mount for 35mm-format SLRs.

The Nikon F-mount was first used on Nikon’s earliest lens-interchangeable SLR camera, the Nikon F, released in June 1959.

The same basic structure used then is the same as the one used now, which Nikon claims allows for a "broader, constantly growing array of compatible lenses".

Here's to another 50!