Lens Mount Adapter K&F Concept KF06.137 for Canon EOS M (EF/EF-S to EF‑M) — model SB6332

K&F Concept KF06.137 (model SB6332) is a mechanical lens mount adapter that allows Canon EF and EF‑S lenses to be attached to Canon EOS M mirrorless cameras with an EF‑M mount. The adapter preserves the optical axis and flange distance required for correct focus and framing, enabling the use of a wide range of EF/EF‑S lenses on EOS M bodies for both stills and video. The adapter does not add electronic contacts; it provides mechanical coupling for lenses that rely on in‑lens aperture control or camera body metering when compatible.

Advantages

The adapter expands lens compatibility, enabling photographers and videographers to use legacy Canon EF and EF‑S lenses as well as many third‑party EF‑mount optics on EOS M cameras. By maintaining correct flange distance and alignment, it supports reliable focus and image quality across the adapted lens range. Its compact metal construction offers a durable, precise mount interface without altering the optical characteristics of the attached lens.

Suitable for

• Photographers who own EF or EF‑S lenses and want to use them on EOS M mirrorless bodies
• Videographers using EOS M cameras who need access to a wider selection of lenses
• Users adapting legacy or third‑party EF‑mount glass for compatibility with modern compact mirrorless cameras

Key specifications

• Mount type: EF/EF‑S to EF‑M mechanical adapter
• Material: metal mount interface with precision machining
• Optical effect: passive adapter — does not include optical elements
• Electrical contacts: none (mechanical only)
• Compatibility: designed for Canon EF and EF‑S lenses and Canon EOS M (EF‑M) cameras
• Dimensions: compact, lightweight form factor suitable for mirrorless bodies

How to use

Align the adapter's EF/EF‑S side with the lens bayonet and rotate until it locks into place, then align the EF‑M side with the camera mount and rotate until it clicks. Set the lens to the appropriate aperture mode if required by the lens design; some lenses require manual aperture control or stopping down via the lens ring. Because the adapter provides no electronic communication, enable appropriate exposure metering or use manual exposure settings on the EOS M camera when necessary. Confirm secure attachment before shooting and support long or heavy lenses with an additional bracket or tripod when required.

Usage recommendations

Use lenses with fully mechanical aperture control or those that can operate without electronic contacts for the most straightforward compatibility. For accurate focusing and exposure with autofocus or electronically controlled lenses, verify lens behavior on your specific EOS M model before critical work. When shooting handheld with larger adapted lenses, consider additional support to protect the camera mount and ensure stable framing.