SPECIFICATIONS:

• 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.

• Lens construction (elements/groups) 7/3
  
• Dust/moisture resistance Yes¹
  
• Max. diameter x length (mm) 72.0 x 27.2
  
• Weight (g) 225
  
• Soft case LP811
  
  

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