Canon Extender EF 1.4x III - Converter - Canon EF

Extending a lens's focal length by a factor of 1.4x, Extender EF 1.4x III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender; features careful lens placement and coatings to minimize ghosting and flare and even has a fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.

• Focal length extension for super-telephoto lenses
  The Extender EF 1.4x III is specially designed to work in conjunction with L-series IS super-telephoto lenses, extending their focal length by a factor of 1.4x. The Extender's design ensures there is no loss of lens performance or image quality.
  
  
• High-quality construction
  Improved anti-reflection materials inside the lens-barrel and a coating around the outer edges of the lens elements reduce flare. Construction is resistant to dust and water, helping to maintain images quality.
  
  
• Improved communication between lens and camera
  A built in microprocessor provides accurate transfer of data from between the lens and camera delivering an improved performance in AF and metering.