Last updated (04 November’10):
The Canon EF 2.0X III Telephoto Extender features Magnification: 2.0x at Focal Length & Maximum Aperture. The lens construction has 9 elements in 9 groups. The Canon EF 2.0X III Telephoto Extender lens weighs 325g and it measures 2.8 inches in diameter and 2.1 inches long.
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Canon EF 2.0X III Telephoto Extender Reviews
Canon EF 2.0X III Telephoto Extender User Reviews
Canon EF 2.0X III Telephoto Extender Sample Photos
– Canon EF 2.0X III Telephoto Extenter Sample Photos @ Flickr.com
Canon EF 2.0X III Telephoto Extenter User Manual
Canon EF 2.0X III Telephoto Extender Specifications
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.
* Focal Length & Maximum Aperture Magnification: 2.0x
* Lens Construction 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
Note: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L.