K&F Concept C-L – C-mount Lens to L-Mount Mount Adapter K&F Concept

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The K&F Concept C-L adapter mounts lenses with the C (C-mount) thread on cameras with the L mount. It is purely mechanical, with no electronic contacts: focusing is done by hand on the lens and the aperture is set with the lens aperture ring. The all-metal adapter is precisely machined and coated inside with matte anti-reflection paint.

C-mount lenses on L-Mount bodies

With the C-L adapter, C-mount lenses can be used on a modern L-Mount body with everything it offers – a viewfinder with magnification for precise manual focusing, sensor stabilisation if the body has it, and current recording formats.

Solid metal construction

The adapter is all-metal, made of copper and aluminium alloy. Precise machining ensures a firm connection without play. The interior is coated with matte paint that absorbs stray light and reduces reflections and flare. The rim is knurled and finely CNC-machined, so the adapter sits firmly in your fingers when mounting and removing it.

Manual focus and aperture

The adapter has no electronic contacts and the camera does not recognise the lens – autofocus, aperture control from the body and lens data in EXIF do not work. Focus with the ring on the lens; magnification or focus peaking in the viewfinder makes precise focusing easier. The aperture is set with the aperture ring on the lens; lenses without an aperture ring cannot be stopped down with this adapter.

First use

Before the first shot, enable shutter release without a lens in the camera menu (on Sony “Release w/o Lens”, a similar option on other brands). Otherwise the body will not treat the adapter without contacts as an attached lens and will not release the shutter.

C-mount lenses

Lenses with the C thread come from 16mm film cameras and from industrial and security cameras and are designed for small sensors. On a larger sensor the corners will therefore vignette; a crop mode helps if the body offers one.

L mount

The L mount was developed jointly by Leica, Panasonic and Sigma. Do not confuse it with the Leica M and Leica R mounts – these are three different systems, so check the mount of your body before buying.

Compatible cameras

Leica T (Typ 701), TL, TL2, CL, SL (Typ 601), SL2, SL2-S, Panasonic Lumix S1, S1R, S1H, S5, Sigma fp, fp L and other bodies with the L mount.

• K&F Concept C-L adapter

• Lens side: C-mount (1"-32 UN)
• Camera side: L-Mount
• Type: mechanical, no electronic contacts
• Focusing: manual
• Aperture: with the lens aperture ring
• Material: copper and aluminium alloy
• Interior: matte anti-reflection paint
• Designation: C-L
• Order code: KF06.522