The Mark III edition of this Canon 1.4x Extender, or teleconverter, is the latest (and probably last) in the EF-mount series, designed for Canon cameras and compatible EF-mount Canon telephoto lenses.

Canon's two new EF extenders are direct replacements of the current extenders offered by Canon as essential accessories for professionals. These new extenders have been designed to provide faster ...

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Canon's EF 200-400 lens delivers terrific optics and unmatched zoom flexibility with an innovative built-in 1.4x telephoto extender. Stephen Shankland Former Principal Writer Stephen Shankland worked ...

Canon’s EF 200-400mm f/4L IS USM Extender 1.4X more than satisfies the requirements of its target market. Sports and wildlife photographers should be delighted by the convenience of the built-in ...