The Extender EF 1.4x III features seven lens elements in three groups, and the Extender EF 2x III features nine lens elements in five groups, ensuring improved optical performance. All optical ...
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 ...
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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