Lens Adapter Pixco for Olympus Four Thirds to M42 mount (model SB904)

Lens Adapter Pixco for Olympus Four Thirds to M42 mount (model SB904) is a mechanical mounting ring that enables the use of Olympus Four Thirds (4/3) lenses on cameras or bodies equipped with an M42 screw mount. The adapter provides a solid metal-to-metal connection that preserves the optical alignment of the attached lens while maintaining manual control of focus and aperture on compatible lenses. There is no electronic communication between the lens and the camera, so exposure metering and aperture actuation depend on the camera body and the lens mechanical controls.

Advantages

This Pixco SB904 adapter offers durable construction and precise fit, designed to minimize play between lens and body for reliable manual operation. By retaining manual aperture and focus control, the adapter allows photographers to exploit legacy Four Thirds optics for creative effects, unusual bokeh, and distinct rendering characteristics. Its simple mechanical design means long-term reliability with no need for firmware updates or electrical contacts.

Suitable for

• Photographers who want to mount Olympus Four Thirds lenses on M42-threaded camera bodies or adapters.
• Users seeking manual control for focus and aperture with legacy glass.
• Creative shooters experimenting with vintage lens rendering and shallow depth-of-field effects.
• Repair shops or technicians needing a mechanical mating solution between 4/3 lenses and M42 mounts.

Key specifications

• Mount conversion: Olympus Four Thirds (4/3) lens to M42 screw mount camera.
• Connection type: fully mechanical adapter with no electronic contacts.
• Material: metal construction for durable mating and alignment.
• Compatibility: Olympus Four Thirds lenses that are physically compatible with the 4/3 mount standard and M42-threaded bodies or extension adapters.
• Controls retained: manual focus and manual aperture operation (where lens provides mechanical aperture control).
• Finish: matte metal surface to reduce reflections and light scatter at the mount interface.

How to use

Attach the adapter to the rear of the Olympus Four Thirds lens by aligning the mount index marks and turning until it locks securely. Then screw the adapter with the mounted lens onto the M42-threaded camera body or extension tube until seated. Set the lens aperture and focus manually on the lens barrel; use the camera’s manual or aperture-priority metering modes if available. Because there is no electronic coupling, confirm metering and exposure settings visually or with the camera’s meter before critical shots.

Usage recommendations

When using the adapter, support heavier lenses to avoid stress on the M42 thread. Work in manual-focus mode and consider focus peaking or magnified live view if your camera offers those aids. If a lens does not have a mechanical aperture lever, stop-down metering or external exposure calculation may be required.