Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses

Extending a lenses focal length by a factor of 1.4x, Canon Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of 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 and flare and even has a fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction. 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.

Amazon Sales Rank: #812 in Camera & Photo Brand: Canon Model: EF 1.4X III Dimensions: 1.10" h x 1.10" w x 2.80" l, .49 pounds Focal Length & Maximum Aperture Magnification: 1.4x Lens Construction of 7 elements in 3 groups Max. Diameter x Length - 2.8" x 1.1" (72.0mm x 27.2mm) Weight - 7.9 oz (225g)

Extending a lens's focal length by a factor of 1.4x, the Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of 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 and flare and even has a new Fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction. Technical Specifications Focal Length & Maximum Aperture Magnification: 1.4x Lens Construction 7 elements in 3 groups Max. Diameter x Length, Wight 2.8 x 1.1 in, 7.9 oz / 72.0 x 27.2mm, 225g

Customer Reviews unusable 4 of 4 people found the following review helpful. Canon EF Extender 1.4 III Lens by John Finkbiner I am very happy with my new lens extender type III. It made for a select group of Canon lenses. To order one for your camera, see this list! With my 70-200mm F4L lens extender, which works very well. I plan to this lens created me to Alaska this summer. It must reach I need. Keep in mind that with this combination, the F5.6 lens is now my one stop slower. I still maintained and the AF is very fast. I'm not going to shoot him in the final dusk. As my zoom lens, this extender closed at the time of the interviews. The extra cost of this extender for my zoom lens gives me the versatility, without the higher cost of buying a new 400 or 500 mm L-series lens of my camera has now made a length of 7 cm and not much extra weight. Combined with my 40D camera body, I can tote that weight all day. 0 of 0 customers found this review helpful Very nice extender W. long as it works great. The pictures are sharp and autofocus works very well. I wish it was not so expensive but I think you get what you pay for. 10 of 18 customers found this review helpful. Not a big change from D. Stoddart I must admit, do not make stringent tests of the TC vs Mark II version, but I do not see any big change. AF speed seems about the same on a 70-00 f2.8 IS mk II and the quality is not improving sufficiently for me to determine. The big change is the quality and speed has been upgraded to the latest 70-200 f2.8 mk II is a huge improvement. 3 ratings ....