K&F Adapter T-mount to Nikon AI/AI-S/AF (KF06.149) — T2/T-Mount to Nikon F lens adapter

The K&F Adapter T-mount to Nikon AI/AI-S/AF (KF06.149) is a mechanical T2 (T-mount) to Nikon F lens adapter designed to allow compatible T-mount lenses, telescopes and manual optics to be mounted on Nikon F-mount cameras with AI, AI-S and AF coupling. The adapter preserves the correct flange focal distance through a solid metal construction, ensuring that lenses and optical accessories can reach focus on Nikon bodies without optical elements. It is intended for applications where a stable mechanical connection and precise register distance are required, such as astrophotography, macro photography and attaching telescopes or specialized manual lenses to Nikon cameras.

Advantages

The adapter provides a secure metal-to-metal connection between T-mount optics and Nikon F bodies, offering precise flange distance compatibility and repeatable mounting. Its mechanical design requires no electronics or optical correction, which preserves the original optical character of attached lenses and accessories. The simple construction reduces potential play or wobble, supports manual focusing, and allows the use of a wide range of third-party optics and telescope systems on Nikon cameras.

Suitable for

• Astrophotography with telescopes or dedicated T-mount astro lenses
• Macro setups using T-mount extension tubes or bellows
• Mounting manual or vintage T2 lenses on Nikon F-mount cameras
• Attaching spotting scopes or small refractors for digiscoping

Key specifications

• Mount type: T2 (T-mount) female to Nikon F male (AI/AI-S/AF compatible)
• Construction: metal alloy body for rigidity and repeatable fit
• Finish: matte black surface to reduce reflections
• Focus method: manual focus only (no optical elements or electronic contacts)
• Size and weight: compact, lightweight design for minimal added bulk

How to use

Attach the T-mount component of your lens, telescope or accessory to the adapter by screwing it into the T2 female thread until secure. Align the adapter’s Nikon F bayonet with the camera’s mount, insert and rotate to lock as you would with a standard Nikon F lens. Ensure the camera’s mirror and sensor can clear the attached optics and verify manual focus and exposure settings on the camera. Because the adapter contains no electronic contacts, set exposure and focus manually or use camera metering and focus aids if supported.

Usage recommendations

Use the adapter on a stable tripod or mount for precise work such as astrophotography or macro imaging. Verify mechanical tightness before critical shoots and avoid excessive torque when mounting to prevent thread damage. For best results with Nikon AF bodies, confirm mechanical AI coupling compatibility if using lenses that rely on aperture indexing; otherwise use manual aperture control where applicable.