Canon Extender EF 2x III

Designed to extend a lenses focal length by a factor of 2x, the Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. It delivers seamless communication among camera body, lens and extender, and features coatings to minimize ghosting, flare and chromatic aberration. The Fluorine coating resists soiling, smears and fingerprints. Extender EF 2X III meets all necessary standards in terms of rugged, dustproof and water-resistant construction, and should be in every professional's camera bag.
This lens extender features high optical performance with improved correction of chromatic aberration by adopting a 1x dispersion lens, and is optimized to reduce ghosting and flare. Please see Compatibility tab for compatible lenses.

Compatibility

-- EF 100-400mm f/4.5-5.6L IS USM
-- EF 100-400mm f/4.5-5.6L IS USM Refurbished
-- EF 135mm f/2L USM
-- EF 180mm f/3.5L Macro USM
-- EF 200mm f/2.8L II USM
-- EF 200mm f/2L IS USM
-- EF 300mm f/2.8L IS USM
-- EF 300mm f/4L IS USM
-- EF 300mm f/4L IS USM Refurbished
-- EF 400mm f/2.8L IS USM
-- EF 400mm f/4 DO IS USM
-- EF 400mm f/5.6L USM
-- EF 500mm f/4L IS USM
-- EF 600mm f/4L IS USM
-- EF 70-200mm f/2.8L IS USM
-- EF 70-200mm f/2.8L IS USM Refurbished
-- EF 70-200mm f/2.8L Refurbished
-- EF 70-200mm f/2.8L USM
-- EF 70-200mm f/4L IS USM
-- EF 70-200mm f/4L IS USM Refurbished
-- EF 70-200mm f/4L USM
-- EF 70-200mm f/4L USM Refurbished
-- EF 800mm f/5.6L IS USM