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Canon Extender EF 2X III for EF-Mount

Canon Extender EF 2X III

Main Features

  • 2.0X Teleconversion
  • 2.0-stop Light Loss
  • Canon EF Mount
  • Communication between Lens & Camera
  • Weather-sealed
  • Weight: 325.0g.
  • Diameter: 72.0mm
  • Length: 52.70mm
CHECK PRICE

CHECK PRICE

Canon Extender EF 2X III Overview

Canon Extender EF 2X III is a teleconverter for use with compatible Canon EF Mount lenses and cameras and provides 2.0X magnification, which means when attached to a compatible lens, the apparent focal range of your lens will be increased 2.0X times. At the same time, this teleconverter reduces the aperture value of the attached lens by 2.0 stops.

Canon Extender EF 2X III for EF-Mount Main Features

  • EF Mount Teleconverter
  • 2.0x Magnification Factor
  • Microcomputer Controlled
  • Communication Between Lens & Camera
  • Spectra Coating Reduces Ghosting/ Flare
  • Protective Fluorine Coating
  • Dust and Water Resistant
  • Compatible with Select EF Mount Lenses

Optical Design

The optical construction of the Canon Extender EF 2X III consists of 9 Elements in 5 Groups.

Physical Specs

The Canon Extender EF 2X III weighs 325.0g / 11.50oz . It has a diameter of 72.0mm / 2.80 inch and a length of 52.70mm / 2.07 inch.

Lenses that are Compatible with Canon Extender EF 2X III for EF-Mount

Currently there are 25 lenses that are compatible with the Canon Extender EF 2X III for EF-Mount. Please be mindful that trying to use a teleconverter with an unsupported lens may result in damage on the lens and the teleconverter itself.

  • Canon EF 70-200mm f2.8L IS II USM
  • Canon EF 70-200mm f2.8L IS USM
  • Canon EF 70-200mm f2.8L USM
  • Canon EF 70-200mm f4.0L USM
  • Canon EF 70-200mm f4L IS USM
  • Canon EF 100-400mm f4.5-5.6L IS USM
  • Canon EF 135mm f2.0L USM
  • Canon EF 200mm f2.8L II USM
  • Canon EF 200mm f2L IS USM
  • Canon EF 300mm f2.8L IS II USM
  • Canon EF 300mm f2.8L IS USM
  • Canon EF 300mm f4.0L IS USM
  • Canon EF 400mm f2.8L IS II USM
  • Canon EF 400mm f2.8L IS USM
  • Canon EF 400mm f5.6L USM
  • Canon EF 500mm f4.0L IS II USM
  • Canon EF 500mm f4.0L IS USM
  • Canon EF 600mm f4.0L IS II USM
  • Canon EF 600mm f4.0L IS USM
  • Canon EF 800mm f5.6L IS USM
  • Canon EF 100-400mm f4.5-5.6L IS II USM
  • Canon EF 70-200 F4L IS II USM
  • Canon EF 70-200 F2.8L IS III USM
  • Canon EF 600mm F4L IS III USM
  • Canon EF 400mm F2.8L IS III USM

Here is table of how the effective focal length and aperture of these lenses change when used with the Canon Extender EF 2X III.

Effective Focal Range and Aperture with Canon Extender EF 2X III
Model Coverage with TC Aperture with TC Street Price
Canon EF 70-200mm f2.8L IS II USM Lens Canon EF 70-200mm f2.8L IS II USM 140 - 400mm F5.6 Amazon B&H Photo
Canon EF 70-200mm f2.8L IS USM Lens Canon EF 70-200mm f2.8L IS USM 140 - 400mm F5.6 Amazon B&H Photo
Canon EF 70-200mm f2.8L USM Lens Canon EF 70-200mm f2.8L USM 140 - 400mm F5.6 Amazon B&H Photo
Canon EF 70-200mm f4.0L USM Lens Canon EF 70-200mm f4.0L USM 140 - 400mm F8 Amazon B&H Photo
Canon EF 70-200mm f4L IS USM Lens Canon EF 70-200mm f4L IS USM 140 - 400mm F8 Amazon B&H Photo
Canon EF 100-400mm f4.5-5.6L IS USM Lens Canon EF 100-400mm f4.5-5.6L IS USM 200 - 800mm F9 - 11.2 Amazon B&H Photo
Canon EF 135mm f2.0L USM Lens Canon EF 135mm f2.0L USM 270mm F4 Amazon B&H Photo
Canon EF 200mm f2.8L II USM Lens Canon EF 200mm f2.8L II USM 400mm F5.6 Amazon B&H Photo
Canon EF 200mm f2L IS USM Lens Canon EF 200mm f2L IS USM 400mm F4 Amazon B&H Photo
Canon EF 300mm f2.8L IS II USM Lens Canon EF 300mm f2.8L IS II USM 600mm F5.6 Amazon B&H Photo
Canon EF 300mm f2.8L IS USM Lens Canon EF 300mm f2.8L IS USM 600mm F5.6 Amazon B&H Photo
Canon EF 300mm f4.0L IS USM Lens Canon EF 300mm f4.0L IS USM 600mm F8 Amazon B&H Photo
Canon EF 400mm f2.8L IS II USM Lens Canon EF 400mm f2.8L IS II USM 800mm F5.6 Amazon B&H Photo
Canon EF 400mm f2.8L IS USM Lens Canon EF 400mm f2.8L IS USM 800mm F5.6 Amazon B&H Photo
Canon EF 400mm f5.6L USM Lens Canon EF 400mm f5.6L USM 800mm F11.2 Amazon B&H Photo
Canon EF 500mm f4.0L IS II USM Lens Canon EF 500mm f4.0L IS II USM 1000mm F8 Amazon B&H Photo
Canon EF 500mm f4.0L IS USM Lens Canon EF 500mm f4.0L IS USM 1000mm F8 Amazon B&H Photo
Canon EF 600mm f4.0L IS II USM Lens Canon EF 600mm f4.0L IS II USM 1200mm F8 Amazon B&H Photo
Canon EF 600mm f4.0L IS USM Lens Canon EF 600mm f4.0L IS USM 1200mm F8 Amazon B&H Photo
Canon EF 800mm f5.6L IS USM Lens Canon EF 800mm f5.6L IS USM 1600mm F11.2 Amazon B&H Photo
Canon EF 100-400mm f4.5-5.6L IS II USM Lens Canon EF 100-400mm f4.5-5.6L IS II USM 200 - 800mm F9 - 11.2 Amazon B&H Photo
Canon EF 70-200 F4L IS II USM Lens Canon EF 70-200 F4L IS II USM 140 - 400mm F8 Amazon B&H Photo
Canon EF 70-200mm F2.8L IS III USM Lens Canon EF 70-200mm F2.8L IS III USM 140 - 400mm F5.6 Amazon B&H Photo
Canon EF 600mm F4L IS III USM Lens Canon EF 600mm F4L IS III USM 1200mm F8 Amazon B&H Photo
Canon EF 400mm F2.8L IS III USM Lens Canon EF 400mm F2.8L IS III USM 800mm F5.6 Amazon B&H Photo

Other Teleconverters in Canon EF Mount
Model Magnification Light Loss Weight Street Price
Sigma TC-1401 1.4x Teleconverter for Canon EF Teleconverter Sigma TC-1401 1.4x Teleconverter for Canon EF
Compare
1.4X 1.0-stop 190.0gr Amazon B&H Photo
Sigma TC-2001 2x Teleconverter for Canon EF Teleconverter Sigma TC-2001 2x Teleconverter for Canon EF
Compare
2.0X 2.0-stop 290.0gr Amazon B&H Photo
Canon Extender EF 1.4X III Teleconverter Canon Extender EF 1.4X III
Compare
1.4X 1.0-stop 225.0gr Amazon B&H Photo
Viltrox C-AF 2x Teleplus Teleconverter for Canon EF Teleconverter Viltrox C-AF 2x Teleplus Teleconverter for Canon EF
Compare
2.0X 2.0-stop 154.0gr Amazon B&H Photo
Kenko TELEPLUS HD pro 2x DGX Teleconverter for Canon EF Teleconverter Kenko TELEPLUS HD pro 2x DGX Teleconverter for Canon EF
Compare
2.0X 2.0-stop 180.0gr Amazon B&H Photo
FotodioX Autofocus 2x Teleconverter for Canon EF Teleconverter FotodioX Autofocus 2x Teleconverter for Canon EF
Compare
2.0X 2.0-stop 184.0gr Amazon B&H Photo
Viltrox EF 1.4x Extender Teleconverter for Canon EF Teleconverter Viltrox EF 1.4x Extender Teleconverter for Canon EF
Compare
1.4X 1.0-stop 190.0gr Amazon B&H Photo
Yongnuo Extender EF 1.4x III Teleconverter Teleconverter Yongnuo Extender EF 1.4x III Teleconverter
Compare
1.4X 1.0-stop 200.0gr Amazon B&H Photo
Kenko TELEPLUS HD pro 1.4x DGX Teleconverter for Canon EF Teleconverter Kenko TELEPLUS HD pro 1.4x DGX Teleconverter for Canon EF
Compare
1.4X 1.0-stop 128.0gr Amazon B&H Photo
Tamron Teleconverter 1.4x for Canon EF Teleconverter Tamron Teleconverter 1.4x for Canon EF
Compare
1.4X 1.0-stop 204.1gr Amazon B&H Photo

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