Lens Mount Adapter K&F M4/3 (Micro 4/3) to Pentax K — model SB6337

K&F SB6337 is a lens mount adapter designed to let Micro Four Thirds (M4/3) lenses be used on cameras with the Pentax K mount. The adapter provides a precise mechanical connection between M4/3 optics and Pentax K bodies while preserving manual aperture control of the mounted lens. It enables photographers to expand their lens options by adapting compact, vintage or specialty M4/3 glass for use on Pentax DSLRs and mirrorless cameras that accept K-mount lenses.

Advantages

The adapter maintains a solid, flange-to-flange mechanical fit with no electronic contacts, ensuring reliable manual focus and aperture operation. Its construction preserves the optical alignment required for accurate focusing and framing when using M4/3 lenses on Pentax K cameras. The compact form factor keeps added bulk to a minimum, making it suitable for travel and handheld shooting while enabling compatibility between different lens ecosystems.

Suitable for

• Photographers who want to use compact M4/3 primes or zooms on Pentax K bodies
• Users adapting vintage or specialty Micro Four Thirds lenses for creative effects
• Studio and location shooters who need a lightweight adapter for manual-lens work
• Enthusiasts experimenting with lens character, bokeh and optical aberrations

Key specifications

• Mount type: Micro Four Thirds (lens) to Pentax K (camera)
• Connection: Mechanical, no electronic contacts
• Aperture control: Manual aperture retained through lens ring or built-in iris
• Material: Metal and precision-machined components for stability
• Finish: Durable coating to resist wear and prevent light leaks
• Compatibility: Designed for M4/3 lenses and Pentax K mount cameras; check lens rear clearance for protruding elements

How to use

Mount the adapter onto the Pentax K camera by aligning the adapter’s camera-side index with the camera’s mount index and turning until it locks into place. Attach the Micro Four Thirds lens to the adapter by aligning the lens index and rotating until secure. Set the lens to manual aperture mode if available or use the lens aperture ring to control exposure. Because the adapter provides only a mechanical connection, focus and aperture adjustments must be performed manually; use focus peaking or magnified view where available on the camera to assist precise focusing.

Usage recommendations

To avoid vignetting or interference with rear elements, verify physical clearance between the lens rear and the adapter before mounting. Use a tripod or steady support for critical focus tasks, and be aware that metering and autofocus functionality from the camera will not be available with this mechanical adapter.