Canon 2x EF Extender II (Teleconverter)

The Canon 2x EF Extender II is a first-party teleconverter designed for use between compatible Canon EF mount lenses and Canon EOS camera bodies, increasing the effective focal length of the attached lens by a factor of 2x while reducing the maximum aperture by two stops. Electronic contacts on both the lens and camera-facing mounts maintain full communication between the lens and body, preserving autofocus operation, image stabilization, and EXIF data transmission for compatible lens and body combinations, though autofocus performance may be reduced depending on the maximum aperture of the combined lens and extender configuration. The second-generation optical formula delivers improved image quality compared to the original EF Extender, and compatibility is limited to specific Canon L-series telephoto lenses as designated by Canon. A practical first-party solution for extending the reach of compatible Canon telephoto lenses without requiring a separate longer focal length lens.

– 2x focal length multiplication factor
– Two-stop reduction in maximum aperture
– Full electronic communication for autofocus and image stabilization
– Maintains EXIF data transmission
– Second-generation optical formula for improved image quality
– Compatible with specific Canon L-series telephoto lenses
– Autofocus performance may vary by lens and aperture combination
– First-party Canon accessory
– Canon EF mount compatibility