Canon Extender EF 2X III

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

The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality.