K&F Concept NIK F-EF – Nikon F Lens to Canon EF Mount Adapter K&F Concept

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The K&F Concept NIK F-EF adapter lets you mount Nikon F mount lenses on Canon EF/EF-S mount cameras. The precisely machined adapter holds the lens firmly with no play. It is a purely mechanical adapter without electronic contacts: focusing is manual, the aperture is set with the ring on the lens, and infinity focus is retained.

Which lenses and cameras

On the lens side it takes Nikon F mount lenses, including AF, AI and AI-S. On the body side it fits Canon EF/EF-S mount cameras, such as the EOS 5D, 7D and the 10D–60D and 300D–1000D series. The adapter is a thin ring that barely adds any length to the lens.

Build and mounting

The adapter is precisely machined, so it sits firmly and without play. The mount does not deform even after 100,000 mounting cycles. A red dot makes mounting easy: align the dots and turn the lens and the body about 90° until the mount clicks. To remove it, hold the spring leaf and turn the adapter back.

Manual operation

The adapter has no electronic contacts, so the camera does not recognise the lens and neither autofocus nor automatic aperture control works. Focusing is manual and the aperture is set with the aperture ring of the lens. Infinity focus is retained.

Tips for use

• On telephoto lenses the infinity mark (∞) is deliberately offset slightly to allow for thermal expansion, so check infinity focus in the viewfinder or on the screen.
• On a body with an APS-C sensor the focal length is multiplied by roughly 1.6×, and a full-frame lens uses its sharp centre.
• A lens designed for APS-C may vignette on a full-frame body.

• 1 × K&F Concept NIK F-EF adapter

• Type: manual lens adapter
• Lens side: Nikon F
• Camera side: Canon EF/EF-S
• Marking: NIK F-EF
• Electronic contacts: no
• Focusing: manual
• Infinity focus: yes
• Aperture control: aperture ring of the lens
• Manufacturer code: KF06.088