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Metabones Canon EF to Micro Four Thirds Speed Booster S





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This Metabones adapter allows you to use your Canon EF lenses on active micro 4/3 mount cameras such as the Panasonic GH4.  This lens adapter is not compatible with passive M 4/3 lens mounts.

Key Features:

  • Increase maximum aperture by 1 stop.
  • Increase MTF.
  • Makes lens 0.71x wider.
  • Build-in electronics to control lens aperture.
  • The lens aperture is set by the controls on the camera body.
  • Powered by camera body. no external power source required.
  • High performance 32-bit processor and efficient switched-mode power supply.