Lens Mount Adapter K&F SB6347 — Fujifilm X / FX to Nikon AI/AI-S mechanical adapter

The K&F SB6347 mechanical lens mount adapter allows Fujifilm X/FX-mount lenses to be mounted on Nikon AI/AI-S-compatible camera bodies. It provides a precise mechanical connection that preserves the correct flange focal distance so manual focus and mechanical aperture control on compatible lenses remain functional. The adapter is designed for photographers who wish to use Fuji mirrorless lenses on older Nikon film cameras or DSLR bodies with AI/AI-S mounts, offering a straightforward, tool-free attachment and reliable physical alignment between lens and camera.

Advantages

The adapter is constructed to ensure a secure and stable mount between Fujifilm X/FX lenses and Nikon AI/AI-S cameras, minimizing play and maintaining optical alignment. Its mechanical design keeps flange distance consistent for accurate focus across the focusing range. The adapter is compact and lightweight, adding minimal bulk while enabling camera-lens compatibility that would otherwise be impossible. No electronic communication is required, preserving full mechanical control where the lens supports it.

Suitable for

• Mounting Fujifilm X/FX manual or mechanically operated lenses on Nikon AI/AI-S film cameras
• Using Fuji lenses on Nikon DSLR bodies that accept AI/AI-S adapted lenses
• Photographers experimenting with mixed-brand lens lineups or vintage optics
• Manual-focus portrait, landscape, and creative photography where lens optics are prioritized over autofocus

Key specifications

• Mount conversion: Fujifilm X/FX lens to Nikon AI/AI-S camera mount
• Type: mechanical, non-electronic adapter
• Material: metal construction for durability and stable connection
• Flange distance: maintains correct flange focal distance for manual focusing
• Finish: matte or anodized surface to reduce reflections and wear
• Weight and size: compact, lightweight design to minimize added bulk

How to use

Attach the adapter to the rear of the Fujifilm X/FX lens by aligning the lens mount index and turning until it locks into place. Then align the adapter with the Nikon AI/AI-S camera mount and secure it following the camera's mounting procedure. Set the lens to manual focus and, if applicable, use the lens aperture ring to select the desired aperture. Confirm mechanical engagement and that the lens sits flush with the camera mount before shooting. Since the adapter has no electronic contacts, set exposure and focus manually or use the camera's metering options where available.

Usage recommendations

Use with manual-focus lenses and enable focus confirmation if your camera supports it with adapted optics. Check lens flange and mount surfaces for dust or debris before mounting. When using on older camera bodies, verify mechanical compatibility and any necessary stop-down metering settings. Store the adapter with caps on both sides when not in use to protect mount surfaces.