K&F Concept C-M4/3 – C-mount Lens to Micro 4/3 Mount Adapter K&F Concept

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The K&F Concept C-M4/3 adapter mounts lenses with the C (C-mount) thread on cameras with the Micro 4/3 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, while infinity focus is retained. The all-metal adapter is precisely machined.

C-mount lenses on Micro 4/3 bodies

With the C-M4/3 adapter, C-mount lenses can be used on a modern Micro 4/3 body with everything it offers – a viewfinder with magnification for precise manual focusing, sensor stabilisation if the body has it, and current recording formats. The length of the adapter matches the difference in flange distance between the two systems, so the lens focuses across its whole range, all the way to infinity.

Solid metal construction

The adapter is all-metal, made of brass and aluminium. Precise machining ensures a firm connection without play.

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.

Heavy lenses

Support heavy lenses with a lens foot or a tripod so that their weight is not carried by the adapter mount alone.

Compatible cameras

Panasonic Lumix G, GH, GX, GM, Olympus PEN, OM-D, Blackmagic Pocket Cinema Camera, JVC GY-LS300, DJI Zenmuse X5, Kodak Pixpro S-1 and other bodies with the Micro 4/3 mount.

• K&F Concept C-M4/3 adapter

• Lens side: C-mount (1"-32 UN)
• Camera side: Micro 4/3
• Type: mechanical, no electronic contacts
• Focusing: manual
• Aperture: with the lens aperture ring
• Infinity focus: yes
• Material: brass and aluminium
• Designation: C-M4/3
• Order code: KF06.328