Canon 1.4x EF II Teleconverter

Extend the focal length of your Canon telephoto lenses by 40% with the Canon 1.4x EF II teleconverter while losing only one stop in lens speed.

Features and Compatibility

• Extends the focal length of compatible lenses by 40%.
• Effective aperture is reduced by one stop.
• Autofocus is possible using the teleconverter with a supported lens with a maximum aperture of f/4 or faster.
• Compatible with prime lenses with a focal length greater than 135mm (but not the 135mm f/2.8 Softfocus), and the 70-200mm and 100-400mm zoom lenses.