Very rare, collectible lens. Originally designed for scientific photography with the Nikon Multiphot system.
Works very well as macro/bellows lens for macro photography above life size. In my tests works even better in stacked configuration, i.e. mounted in front of a relatively long (80+ mm) focal length rear lens.
Standard RMS mounting thread. Can be mounted on virtually any camera, extention tubes or bellows, via adapter. Shoot me a message if you're unsure about mounting/configuration.
In very good condition with normal signs of wear and age. Clean optics, no fungus, scratches, etc. A few micro dust specks, with no impact on quality. Aperture ring works properly. Comes in plastic vial for protection and storage.