This is a rugged, vintage accessory designed for the Nikon F-Mount system, identified by the clear Nikon F JAPAN engraving. This adapter is a heavy-duty, all-metal ring used to connect non-Nikon lenses or specialized accessories (such as bellows or early rangefinder lenses) to the Nikon F camera body.

Its robust construction and precision engineering are characteristic of early Nippon Kogaku accessories. The adapter features a silver Nikon F bayonet mount on one side and a threaded interior, often used for converting Exakta, Topcon, or certain screw mount lenses for use on the Nikon F SLR system. The attached knurled thumb screws and pins are likely part of a locking mechanism or a manual aperture control system for the attached lens.

This is an essential piece for collectors or photographers looking to integrate vintage optics into their Nikon F film kit.

Technical Specifications

• Brand: Nikon F (Nippon Kogaku Japan)
• Mount (Camera Side): Nikon F Bayonet
• Mount (Lens Side): Threaded Mount or Proprietary Mechanism (designed to accept non-Nikon lenses or extension rings)
• Material: Chrome Plated Metal and Anodized Aluminum
• Function: Lens Conversion or Close-up Macro Extension (Adapter/Ring)

Condition Report

The adapter is in Very Good (VG) cosmetic condition consistent with age and use.

• Functionality: All mechanical screws and pins are present and move freely. The adapter mounts securely onto a Nikon F body (tested for fit).
• Cosmetic: The chrome bayonet ring shows minor surface scuffing and small scratches from repeated mounting. The black anodized barrel is mostly intact with minimal paint loss.