Selling my personal, hardly used Canon Extender EF 2x III with Lens Case. Comes with everything that's typically included when purchasing it brand new (both caps, lens case, paperwork and box).

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, dust proof and water-resistant construction, and should be in every professional's camera bag.