Reviews and Problems with Canon Extender EF 2x III
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Canon Lens Reviews
The Digital Picture
26 February 2014
Excerpt: As represented above, Canon offers a huge range of prime (fixed focal length) lenses. Options range from ultra-wide angle through super telephoto and from tilt-shift through macro. There is a lens for practically every need included here. There is something for the tiniest subjects through the largest. From the closest to the most-distant.
Excerpt: The Canon EF 2x III Extender mounts between your Canon EOS Digital SLR and a compatible lens (primarily Canon L Series lenses), extending the focal length of the lens by a very noticeable 2x. The huge focal length increase of course comes with some penalties, including a modest financial cost, some size and weight addition and more impacting, a decrease in image quality and maximum aperture.