Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender, features careful lens placement and coatings to minimize ghosting, flare and chromatic aberration, and even has a new Fluorine coating that keeps soiling, smears, fingerprints to a minimum. Extender EF 2X III meets necessary standards in terms of rugged, dustproof and water-resistant construction, and should be in every professional's camera bag.
Please keep in mind that using this Tele-Converter "costs" two stops of light, so your 70-200 f/2.8 will become a 140-400 f/5.6. Certain cameras have trouble auto-focusing at apertures beyond f/5.6, call us if you have any concerns.
Does this teleconverter support autofocus?
Which lenses do you recommend for use with this teleconverter?
Is this teleconverter incompatible with any lenses?
Focal Length & Maximum Aperture
9 elements in 5 groups
Max. Diameter x Length, Weight
2.8 x 2.1 in, 11.5 oz. / 72.0 x 52.7mm, 325g
Manual Focus Only