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.

Just like with any 2x teleconverter, the focal length of the attached lens is doubled, with a consequent aperture reduction of two f/stops. As such, a 70-200mm f/2.8 zoom effectively becomes roughly a ...

To coincide with the unveiling of their new 60D DSLR, Canon has also announced four serious new lenses and a pair of extenders to go with them. Here’s the rundown. Canon EF 8-15mm f/4L USM This is ...

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The Canon Extender EF 1.4x III & Canon Extender EF 2x III are expected to be available in December for an approximate retail price of $500 each. New Lens Features In addition to an anti-reflection ...

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 ...