Canon Extender EF 2x III
Mfg # 4410B002
CDW # 2341136
| UNSPSC 45121603
Know your gear
Designed to extend a lens's 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 fluorine coating that keeps soiling, smears and 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.
Enhance your purchase
Canon Extender EF 2x III is rated4.70 out of5 by10.
Rated 5 out of 5 byShiftysdad from Great extender for my needsOutstanding images with this in conjunction with my 300mmF2.8L. Frustrating that it does not work with the 100-400 F4.5L ll USM, while it did work with the original version of this lens, (although this was not consistent).I also own the 1.4x extender. Curious that it works with all of the above mentioned lenses.
Date published: 2015-08-09T00:00:00-04:00
Rated 5 out of 5 by66iskix from Superb dealI wanted to expand the range of my EF 100-400L lens and this teleconverter (2x III fit the bill. I am using both on the Canon EOS R with a control ring adapter and they both work very well with this setup. Focusing is quick. At the outer limit (800mm) I am getting the shots I was looking for.
Date published: 2019-03-26T00:00:00-04:00
Rated 5 out of 5 byTLH from Fantastic Photos!I had tried this in the Arctic and was happy with results. I purchased this refurbished Extender from Canon (as I have before with other items and have been happy with the results. The item was delivered in great shape and works excellently!
Date published: 2018-07-29T00:00:00-04:00
Rated 5 out of 5 byArchitect1776 from Exceede my ExpectationsI acquired this extender to add length to my new 100-400mm L MII lens. I use it on my 7D. I knew from reading my manuals that AF is not possible so that is not an issue as I educated myself in this regard.But what images, I really cannot find fault with the image quality of this extender. It is like the lens and extender were designed for each other. Very sharp. Now obviously on very distant shots there is degradation but again I know this is due more to atmospherics than the lens. On shots within 1/2 mile absolutely incredible I recommend this extender for those who understand the AF limitations.
Date published: 2017-03-22T00:00:00-04:00
Rated 5 out of 5 byBlurryeyed from Excellent IQ.I bought this adapter to use with my 300mm f/2.8 II IS lens on a 5DSR. I was a bit concerned because I needed a lens that would have as good or better image quality than my Canon 500mm f/4L IS yet offer the ease of handheld use as does my 100-400 II. I have been quite happy with the results, this combination clearly is sharper than my 500mm f/4 and is easily used handheld. At 300mm the f/2.8 would not be long enough for what I mostly use it for which is birding, with the 2X extender the resulting 600mm f/5.6 lens is not only easy to use but it is sharp as a tack. Had I been able to afford the 600mm f/4 that is probably the route I would have taken but that was just not in the cards for me. The focus system does not seem to suffer with the extender, I am quite happy and feel that the extender was necessary for the photography I do and have been quite pleased with the performance.
Date published: 2019-05-29T00:00:00-04:00
Rated 5 out of 5 byMacjestic from Great AccessoryOnly used the 2X teleconverter once with my new 70-300mm; I'm still getting used to it. The few picture I have taken look great. I do recommend a tripod or monopod to help steady the camera.
Date published: 2019-08-19T00:00:00-04:00
Rated 5 out of 5 byJohn X from Works great with the EOS R and then 100-400 which gave me a reach of 8Works with the EOS R for giving you the reach. Used on the 100-400 which gave me a reach of 800mm
Date published: 2019-09-20T00:00:00-04:00
Rated 5 out of 5 bydrwiswell from Digital zoom is better.First Canon product I ever returned, better to do a digital zoom.
Date published: 2018-10-28T00:00:00-04:00
Rated 5 out of 5 byBush from Auto focus limitedI should have purchased the extender 1.4 for better auto focus but am working with that issue may consider the 800 f5.6 super telephoto
Date published: 2018-08-12T00:00:00-04:00
Rated 5 out of 5 byunknown from Important tool in my kit!This piece was added when I acquired another "big white" lens.
Date published: 2019-02-14T00:00:00-05:00