Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses International Version

Extending a lens's focal length by a factor of 1.4 x, the 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 new 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.

Technical

Specifications

Focal Length & Maximum
Aperture Magnification: 1.4 x Lens Construction 7 elements in 3 groups Max. Diameter x Length, Wight 2.8 x 1.1 in, 7.9 oz / 72.0 x 27.2 mm, 225g