Canon Extender EF 2X III
| 
   Designed to extend a lenses focal length by a factor of 2x,
  the redesigned Canon Extender EF 2X III delivers optical performance on par
  with the finest 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,
  flare and chromatic aberration, and even has a new Fluorine coating that
  keeps soiling, smears, fingerprints to a minimum. Extender EF 2X III meets
  necessary standards in terms of rugged, dustproof and water-resistant
  construction, and should be in every professional`s camera bag.   Specification:    | 
 |
| 
   Focal Length & Maximum Aperture   | 
  
   Magnification: 2.0x  | 
 
| 
   Lens Construction   | 
  
   9 elements in 5 groups  | 
 
| 
   Max. Diameter x Length, Weight   | 
  
   2.8 x 2.1 in, 11.5 oz. / 72.0 x 52.7mm, 325g  | 
 
| Technical | |
| Warranty | PT Datascrip | 
                        