Lens adapter BIG Adapter M42 421338 for Canon EF mount

BIG Adapter M42 421338 is a mechanical lens adapter that enables mounting interchangeable M42-threaded lenses on Canon EF and EF-S bayonet cameras. The adapter provides a stable, purely mechanical connection without electronic contacts, preserving manual focus and aperture control of the attached lens for use with Canon EF-mount bodies.

Advantages

The adapter offers secure physical mounting between M42 lenses and Canon EF/EF-S bodies while maintaining full manual operation of aperture and focus. Its simple mechanical design ensures broad compatibility with vintage and modern M42 lenses and requires no power or electronic communication. The adapter is lightweight and compact, facilitating easy attachment and removal.

Suitable for

• Photographers using vintage M42 lenses on Canon EF or EF-S cameras
• Videographers who need manual aperture and focus control with legacy glass
• Users who want to experiment with unique optical characteristics of classic lenses
• Adaptation of interchangeable M42 threaded lenses to Canon EOS bodies

Key specifications

• Model: BIG Adapter M42 421338
• Mount A (lens side): M42 screw thread
• Mount B (camera side): Canon EF/EF-S bayonet
• Connection type: Mechanical only, no electronic contacts
• Compatibility: M42 lenses to Canon EF and EF-S mount cameras
• MPN: 421338
• EAN: 4501914213389

How to use

Attach the M42 lens to the adapter by screwing the lens into the M42 thread until secure. Align the adapter's Canon EF bayonet with the camera's mount, then rotate until it locks into place. Use the lens's manual focus and aperture ring to control focus and exposure. To remove, press the camera’s lens release button and rotate the adapter off the camera mount, then unscrew the lens from the adapter.

Usage recommendations

Because the adapter has no electronic contacts, enable manual exposure or use aperture-priority modes as appropriate; metering and EXIF data may be limited. Check flange focal distance and focus to infinity with your lens—some M42 lenses require micro-adjustment or may not achieve infinity focus on certain camera bodies. Handle threads carefully to avoid cross-threading when attaching or detaching the lens.