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Canon EF 2x III Extender

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Canon EF 2x III Extender

The Canon Extender EF 2X III is designed for select Canon L-series telephoto lenses. The extender is perfect for photojournalists, nature and sports photographers who need to get close to distant and challenging subjects. The Extender EF 2x III increases the focal length of a lens by a factor of 2x while still delivering good image quality. It combines enhanced environmental protection, redesigned optics and improved data communication between lens and camera.

Note: Autofocus will work only if the effective aperture is within the range of the camera (currently f/8 with most EOS cameras).

This extender is only compatible with select Canon lenses including:

  • EF 135mm f/2L USM
  • EF 180mm f/3.5L Macro USM
  • EF 200mm f/1.8L USM
  • EF 200mm f/2.8L II USM
  • EF 300mm f/2.8L IS USM
  • EF 300mm f/4L IS USM
  • EF 400mm f/2.8L IS USM
  • EF 400mm f/4L DO IS USM
  • EF 400mm f/5.6L USM
  • EF 500mm f/4L IS USM
  • EF 600mm f/4L IS USM
  • EF 1200mm f/5.6L USM
  • EF 70-200mm L USM (all versions)

Note: Autofocus will work only if the effective aperture is within the range of the camera (currently f/8 with most EOS cameras).


  • Magnification: 2x
  • Lens Elements/Groups: 7/3

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