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Canon Extender EF 2X III USA

B&H # CA2XEF3 Mfr # 4410B002
In Stock
Free Expedited Shipping
You Pay: $449.00
Product Highlights
  • EF Mount Teleconverter
  • 2.0x Magnification Factor
  • Microcomputer Controlled
  • Communication Between Lens & Camera
  • Spectra Coating Reduces Ghosting/ Flare
  • Protective Fluorine Coating
  • Dust and Water Resistant
  • Compatible with Select EF Mount Lenses

The Extender EF 2X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses.

The Extender EF 2x III features nine optical elements in five groups, ensuring improved optical performance. All optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings.

To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops.

A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.

Note: This converter 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. Additionally, please see the lens and/or camera body manual for full autofocus compatibility information with the Extender EF 2X III.

Carefully positioned lens release mechanism makes it easy to mount the extender quickly, reducing the time the camera and lens are exposed to the environment.
Integrated processor communicates between camera and lens and ensures all focusing, metering and ID information is available.
All optical elements use Canon's Super Spectra coating, reducing ghosting and flare.
Fluorine Coating on the front and rear elements keeps soiling, smears, and fingerprints to a minimum.
Sealed to be resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
Magnification 2.0x
Lens Elements/Groups 9/5
Light Loss 2 Stops
Length 2.1" (52.7mm)
Diameter 2.8" (72.0mm)
Weight 11.46 oz (325g)
Canon Extender EF 2X III
  • Extender Cap E II
  • Lens Dust Cap E (Rear)
  • Lens Case LP811
  • Limited 1-Year Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    CanonExtender EF 2X III
     
    4.5

    (based on 328 reviews)

    Ratings Distribution

    • 5 Stars

       

      (207)

    • 4 Stars

       

      (92)

    • 3 Stars

       

      (16)

    • 2 Stars

       

      (8)

    • 1 Stars

       

      (5)

    94%

    of respondents would recommend this to a friend.

    Pros

    • Strong construction (152)
    • Easily interchangeable (139)
    • Durable (115)
    • Rugged (102)
    • Consistent output (89)

    Cons

    • Poor in low light (61)
    • Slow focus (41)
    • Heavy (21)
    • Blurry focus (11)
    • No increase in performance (3)

    Best Uses

    • Wildlife photos (169)
    • Sports/action (102)
    • Landscape/scenery (84)
    • Shooting outdoors (67)
    • Weddings (24)
      • Reviewer Profile:
      • Photo enthusiast (96), Semi-pro photographer (78), Pro photographer (33), Tech savvy (29), Casual photographer (13)
      • Was this a gift?:
      • No (283), Yes (13)

    Most Liked Positive Review

     

    Nice addition.

    I am very surprised with this extender. I am using this on a 5D Mark III with the 70-200 f/2.8 IS II. I read several reviews saying the image wasn't very sharp...Read complete review

    I am very surprised with this extender. I am using this on a 5D Mark III with the 70-200 f/2.8 IS II. I read several reviews saying the image wasn't very sharp but I am getting some great results with it (even hand held.) Just remember to double the shutter speed compared to your zoom to get the best results. So if you are shooting at 200mm with the 2x extender you will be at 400mm so your shutter speed will need to be at least 1/800 to get the best results. If you are on a tripod you can get away with a slower shutter but I try to keep it at least equivalent to the lens. I will attach a quick photo I shot from 20ft away at 400mm total and then the cropped version to see all the detail.

    The compatibility chart says, "If the EF 70-200mm f/2.8L USM lens is attached to an EOS camera having multiple focusing points and an Extender is attached to the lens, only the center focusing point will be usable for AF". But, to my surprise, ALL of my focus points are working with this lens and the 2x extender. I had to go back and re-read it to make sure I wasn't misunderstanding, but EVERY focus point is working even though it says only the center focus point would be useable. The only drawback I can see so far is the focus is much slower to find it's mark in low light but seems to be great with well lit subjects. So maybe the message is for older cameras?

    One other thing I have noticed but haven't had time to do a real test is the depth of field. The loss of light is as it should be by doubling the 2.8 to 5.6 but the depth of field doesn't seem to follow what I expected. Normally if I am shooting a subject at f5.6, I would have a deeper focus area. With the extender, I seem to be getting a really shallow depth of field as if I were still shooting at 2.8. So to get some more usable focus depth I have to stop it down to 7.1 or higher (as you can see in photos below shot at f9). I actually like the really shallow depth I am getting since I mostly shoot artistic shots and modeling but I could see how this would be a problem with sports and such and may be the reason some people are getting some softer results. And again, I haven't had time to completely test this theory.

    So, to sum it up. I have had very sharp results with the 2x Extender as long as I keep the shutter at the proper speed. It is a great way to double your compatible lenses (will not work with incompatible lenses because of the way part of it slides into the lens.) And, on my 5D Mark III with the 70-200 2.8 IS II, ALL the focus points are working. I love having a small way to basically have the zoom of a 400 without carrying the extra bulk and the cost. If I were shooting sports or such for a living, I would buy the proper lens. It does lose focus speed relative to the amount of light available and in lower light may not focus at all unless you can find a hard edge to catch.

    VS

    Most Liked Negative Review

     

    Disappointed

    I had never tried a 2X before, thinking it might be too good to be true. But with the new series III, I thought it might be OK on a high-quality prime lens. ...Read complete review

    I had never tried a 2X before, thinking it might be too good to be true. But with the new series III, I thought it might be OK on a high-quality prime lens. I went out for the day with my 7D and the 2x extender attached to a 500mm f4 IS lens. During the shooting (birds at considerable distance), I revelled in the closer view I was getting. However, back at the computer, I wasn't so happy. I am used to getting crisp feather detail on bird images, having learned good technique over about 5 years of serious practice with wildlife, shooting with Canon gear, most shots using the above 500mm lens with a 1.4X Extender. There was no crisp detail in any of the shots with the 2x. Even with ambitious post-processing from RAW, they were throwaway shots. The best single descriptor I had for the shots was "mush".

    To be sure it wasn't just a bad day, I set up a controlled situation indoors. Mounted to a sturdy Gitzo tripod, with mirror locked up, etc., I took photos with just the 500mm lens mounted, then the 1.4X, then the 2.0X, all of the same subjects. Later I compared them on the computer, with the same results I got in the field; the 500mm results were sharp, the 1.4X a little less so but still very good, and the 2.0x result were garbage. Here was the decisive test: I resized the test photos from the 500mm alone by a factor of 2.0 in Photoshop, something no sane photographer would do to achieve a better result. However, the resulting images were sharper than those taken with the 2.0X extender. In short, the 2.0x not only did not provide and benefit, it was actually detrimental. I concluded I would get better results by shooting with the 500mm alone and cropping to fill the frame with the bird. Fortunately, I bought this from B&H rather than from someone on an on-line auction site or a lesser retail company. They took it back in a completely pleasant and business-like manner. Thank you, B&H.

    This results still confuses me. The people at Canon are no dummies, so why would they make something that provides no benefit? I have no answer to that. It is just possible that I had a defective unit, so before you use this review alone to make your decision, search for others.

    Reviewed by 328 customers

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    Displaying reviews 1-20

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    5.0

    Useful under right conditions

    By Bird Lady

    from Hereford, AZ

    About Me Semi-pro Photographer

    Verified Buyer

    Pros

      Cons

        Best Uses

        • Wildlife Photos

        Comments about Canon Extender EF 2X III:

        Have been using this with Canon 300 F4 IS lens and 7D Mark II. What I find is that if the subject is relatively close, i.e., birds which are small so you need a lot of magnification this works very well. You will only have one focus point. The more atmosphere between you and the subject, the less chance of a very good sharp result. Where there is very highcontrast, white against black for example, there is purple CA easily removed in photoshop CS6. Also works well with Canon 500 F4. I recommend it. I bought it to use when I didn't want to carrythe 500 f4 long distances or on an airplane to a foreign country or have reason to hand hold. That said, it works well for me in good light shooting at f11 or not good light shooting high ISO which means more work in photoshop. Just be aware that there are limitations and trade offs.

        • Was this a gift?:
        • No

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        5.0

        Great addition to my lens collection

        By Don F

        from Leominster, MA

        Comments about Canon Extender EF 2X III:

        Tried the Canon Extender EF 1.4x III and exchanged it for the 2.0x III to be used with my Canon 7D camera and 70-200mm lens. I found that the 1.4x did not meet my expectations, but the 2.0x did. Will use it for sports photography with plans to also shoot HD video content with it.

        Share this review

         
        5.0

        Extra access!

        By Brian Dzyak, EPK/BTS Cameraman

        from Encino, CA

        About Me Pro Photographer

        Verified Buyer

        Pros

        • Consistent Output
        • Durable
        • Easily Interchangeable
        • Lightweight
        • Rugged
        • Strong Construction

        Cons

          Best Uses

          • Landscape/Scenery
          • Sports/Action
          • Video

          Comments about Canon Extender EF 2X III:

          I'm a professional videographer/cameraman shooting behind-the-scenes on large motion picture sets so getting cameras into places is a large part of what my daily job is.

          In my most recent case, I am having to hang back a bit farther than usually, so I'm finding myself on the long end of the lens more often than not.

          Using a Canon-to Sony adaptor, I am able to use my Canon E series 70-200mm with the Extender to give me 400mm on my Sony F5. Using the internal 2K crop feature on the F5, I get an effective 800mm!

          The Extender is well worth the price helping me to get the shots I couldn't get otherwise.

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          A great companion to the Canon 70-200

          By Mark617

          from Cambridge, MA

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Fast / accurate auto-focus
          • Lightweight

          Cons

            Best Uses

            • Sports/Action
            • Wildlife Photos

            Comments about Canon Extender EF 2X III:

            I periodically shoot crew rowing regattas and the boats are typically 100+ yards away. The 2X extender works great with my 70-200 lens and the shots are quite sharp. The recent $[$] price break makes the economics of the 2x versus buying a new, longer lens that more compelling. Contrary to some negative feedback I've seen I haven't experienced slowness with the autofocus. I do tend to use a monopod for extra stabilization.

            • Was this a gift?:
            • No

            Share this review

             
            4.0

            Sweet Extender

            By kalihari

            from Walla Walla, Wa

            About Me Pro Photographer

            Verified Buyer

            Pros

            • Durable
            • Easily Interchangeable
            • Lightweight
            • Rugged
            • Strong Construction

            Cons

              Best Uses

              • Sports/Action
              • Wildlife Photos

              Comments about Canon Extender EF 2X III:

              Works very well, top quality.

              Only complaint is that it can't be mated with the 1.4x for extra extension.

              Works great on the Sigma 120-300 f/2.8

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Great buy for what it does

              By Jae

              from Torrance, CA

              About Me Casual Photographer

              Verified Buyer

              Pros

              • Easily Interchangeable
              • Fast / accurate auto-focus
              • Lightweight
              • Strong Construction

              Cons

                Best Uses

                • Landscape/Scenery
                • Weddings/Events
                • Wildlife Photos

                Comments about Canon Extender EF 2X III:

                Used the extender the day I received it and picture quality and AF speed is good.

                I've always had a great experience buying all of my camera supplies from B&H. They are honest and dependable. They do what they promise. Highly recommend.

                • Was this a gift?:
                • No

                Share this review

                (3 of 3 customers found this review helpful)

                 
                5.0

                As I expected.

                By bmcbride

                from Ontario, Ca.

                Comments about Canon Extender EF 2X III:

                I have been considering a doubler fr some time. And upon unpacking it I was not dissappointed. The.quality and workmanship are excellent. The price was more than the aftermarket doubters, but over the years I have found that you get what you pay for. So I don't cut corners. The picture quality through my EE 100-400mm f/.5-5.6 L IS UMS lens is more than I had hoped for.

                Share this review

                 
                4.0

                The inbetween product

                By Huey

                from Rochester, MN

                About Me Photography Student

                Verified Buyer

                Pros

                • Lightweight
                • Rugged
                • Strong Construction

                Cons

                • Poor in Low Light

                Best Uses

                • Landscape/Scenery

                Comments about Canon Extender EF 2X III:

                The 2x Extender is a good selection for those who need the longer focal lengths, but are not ready to commit to the higher prices. The draw back of course is the loss of two stops, but can work around those. Also helps my main lense is f2.8. My test results were good and will use this extender again.

                • Was this a gift?:
                • No

                Share this review

                (3 of 3 customers found this review helpful)

                 
                4.0

                Close Encounters of the Focal Kind

                By Michael

                from Glarus, Switzerland

                About Me Pro Photographer

                Verified Reviewer

                Pros

                • Consistent Output
                • Easily Interchangeable
                • Lightweight
                • Rugged

                Cons

                  Best Uses

                  • Landscape/Scenery

                  Comments about Canon Extender EF 2X III:

                  As other reviews indicate, there is a loss of light (on the 135 mm 2.0, it becomes 270 mm 4.0)- this being understood, having the availability of such powerful magnification/telefoto is fantastic.

                  For myself, the 70-200 2.8 is needed for more flexibility, and with the 2x it means 140-400mm- plus, due to working with a crop-sensor 70D, it yields a whopping 224mm to 640 mm.

                  That being said, the extender needs to be considered for what it is- a tremendous magnifier for less cost and weight of a dedicated higher-tele prime, but with some caveats- also, to need to change out (135mm vs 270mm) quickly is a practice- still, this is definitely a high-quality piece of equipment for enjoying closer encounters of the focal kind.

                  • Was this a gift?:
                  • No

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                  5.0

                  Need more focal length ???

                  By Mark Allen Reese Photography

                  from Grand Jct., Colorado

                  About Me Pro Photographer

                  Verified Buyer

                  Pros

                  • Consistent Output
                  • Durable
                  • Easily Interchangeable
                  • Rugged
                  • Strong Construction

                  Cons

                  • Heavy

                  Best Uses

                  • Landscape/Scenery
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  I mainly use this when I am shooting wild life or sunsets.

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  5.0

                  Good Products

                  By Gr

                  from Boston

                  Comments about Canon Extender EF 2X III:

                  Nicely install on my 5d3 and 70-200 is2

                  Share this review

                   
                  5.0

                  Fantastic Product

                  By Krazy Kajun

                  from Ladys Island, SC

                  About Me Semi-pro Photographer

                  Verified Buyer

                  Pros

                  • Consistent Output
                  • Durable
                  • Easily Interchangeable
                  • Fast / accurate auto-focus
                  • Rugged
                  • Strong Construction

                  Cons

                  • Heavy

                  Best Uses

                  • Sports/Action
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  Wildlife Photography
                  Turns my 500mm lens to a 1,000 mm lens
                  Must use support when connected to 500 mm lens.

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  5.0

                  Well worth the money

                  By krag851

                  from Tampa, FL

                  About Me Photo Enthusiast

                  Verified Buyer

                  Pros

                  • Consistent Output
                  • Durable
                  • Easily Interchangeable
                  • Fast / accurate auto-focus
                  • Rugged
                  • Strong Construction

                  Cons

                  • Poor in Low Light
                  • Slow Focus

                  Best Uses

                  • Landscape/Scenery
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  I bought this extender as a cheaper alternative to buying a longer telephoto lens. Using it on my Canon 7D with the 70-200mm L II lens has proven to be a great way to get animal closeups at a fraction of the cost of a good telephoto lens.

                  • Was this a gift?:
                  • No

                  Share this review

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  Nice Lightweight Compromise

                  By TNPhoto

                  from Nashville, TN

                  About Me Semi-pro Photographer

                  Verified Buyer

                  Pros

                  • Durable
                  • Easily Interchangeable
                  • Extra Reach
                  • Lightweight
                  • Strong Construction

                  Cons

                  • Auto Focus Won't Work
                  • Little slow for sports
                  • Poor in Low Light
                  • Slow Focus

                  Best Uses

                  • Bird photography
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  The 2x III Extender is a nice accessory to have in your bag. It does what it claims - it doubles your focal length for select Canon L lens. This is nice when you need more reach and you don't have a longer lens with you. The downside is the lose of light - you lose 2 stops with this device. Also, auto focus will not work with some camera bodies so use of a tripod & manual focusing is necessary. Other that that, the sharpness & contrast is very good and the extra reach is nice to have.

                  • Was this a gift?:
                  • No

                  Share this review

                  (0 of 1 customers found this review helpful)

                   
                  3.0

                  soft pic

                  By oldman

                  from Virgina Beach, VA

                  About Me Semi-pro Photographer

                  Verified Buyer

                  Pros

                  • Durable
                  • Easily Interchangeable
                  • Rugged
                  • Strong Construction

                  Cons

                  • Blurry Focus

                  Best Uses

                    Comments about Canon Extender EF 2X III:

                    The images where to soft for me. I think you need to micro-adjust for lens used with the extension.

                    • Was this a gift?:
                    • No

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                    (2 of 4 customers found this review helpful)

                     
                    1.0

                    softens and fringes images

                    By felixtm

                    from miami FL

                    About Me Pro Photographer

                    Verified Reviewer

                    Pros

                      Cons

                      • Fringing
                      • Soft image

                      Best Uses

                      • Landscape/Scenery
                      • Sports/Action
                      • Weddings/Events

                      Comments about Canon Extender EF 2X III:

                      I just bought this to couple with my 17mm tse and 24mm tse and also on the 70-200 2.8 IS II and and completly not happy with any of the results yet.
                      I'm a professional architectural photographer and this is significantly softening images and adding red and purple fringing on contrasting lines much like using a 18-55 kit lens or so. all my tse lenses are very sharp with no fringing. I will test further with adjusting back/forward focus to see if that will reduce the fringing and softness.
                      I also tested this on the 70-200 is II so with this converter your max open aperature is 5.6 which is ok but the same negative results are occuring as well with fringing and softening images. Iadjusted 5 pointes back focus and the results were a little better but still softer and would look bad on a large print.

                      • Was this a gift?:
                      • No

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                      5.0

                      Brilliant – addition; but learn how to m

                      By ThomasInAms

                      from San Jose CA, Amsterdam NL

                      About Me Semi-pro Photographer

                      Verified Buyer

                      Pros

                      • Consistent Output
                      • Easily Interchangeable
                      • Rugged

                      Cons

                      • Heavy

                      Best Uses

                      • Landscape/Scenery
                      • Wildlife Photos

                      Comments about Canon Extender EF 2X III:

                      It is interesting to see some complaints about lack of sharpness, especially on the EF 70-200mm f/2.8L USM.

                      I am the first to admit, that the fore mentioned lens is an incredible work of engineering – and delivers excellent results independent of head behind the camera skill.

                      Add the 2X extender and now you have a different lens. This lens is also brilliant BUT is less forgiving and head behind camera must adjust accordingly.

                      Take the time to learn and understand your new lens. You will be very pleased with the results..

                      • Was this a gift?:
                      • No

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                      5.0

                      Just what I wanted!

                      By Gary

                      from Connecticut

                      About Me Pro Photographer

                      Verified Buyer

                      Pros

                      • Easily Interchangeable
                      • Rugged
                      • Strong Construction

                      Cons

                        Best Uses

                        • Sports/Action

                        Comments about Canon Extender EF 2X III:

                        This 2X Extender is exactly what I wanted.

                        • Was this a gift?:
                        • No

                        Share this review

                        (6 of 6 customers found this review helpful)

                         
                        5.0

                        Excellent in the right circumstances

                        By KMD

                        from Ohio

                        About Me Semi-pro Photographer

                        Verified Reviewer

                        Pros

                        • Consistent Output
                        • Durable
                        • Easily Interchangeable
                        • Lightweight
                        • Rugged
                        • Strong Construction

                        Cons

                        • Poor in Low Light
                        • Slow Focus

                        Best Uses

                        • Wildlife Photos

                        Comments about Canon Extender EF 2X III:

                        I purchased this to use with my 5DIII and 200-400 f/4. I was very hesitant given some of the very poor reviews, and because I've always read that image quality was significantly degraded with extenders, especially the 2X. My experience is that in the right circumstances any loss in image quality is more than compensated for by putting more pixels on the target. Like any long lens, this TC will not allow shooting at greater distances. What is does is allow putting more pixels on the target from reasonable distances. In my opinion the only real downsides are slower focusing for action photos, like birds and aircraft in flight, and the loss of two stops of light in low light situations. But for static subjects, this TC stays on my 200-400 almost all of the time, unless I'm shooting in low or difficult lighting.

                        • Was this a gift?:
                        • No

                        Share this review

                         
                        5.0

                        An outstanding addition to my lens kit

                        By Tribaltat

                        from Maine, USA

                        About Me Semi-pro Photographer

                        Verified Reviewer

                        Pros

                        • Consistent Output
                        • Nice Bokeh
                        • Strong Construction

                        Cons

                          Best Uses

                          • Sports/Action
                          • Wildlife Photos

                          Comments about Canon Extender EF 2X III:

                          I purchased this item to use for whale, seal, and bird photography. I had read several reviews indicating that the photos taken using this extender were often a bit soft. I was also concerned that it was only compatible with certain lens/camera combinations. I recently had the chance to use it during a puffin and whale watch trip and was shocked by how sharp the photos turned out. I matched it with my Canon 300mm f/4L and Canon 1D mkIV. This combination still allows the camera's auto/servo focus and stabilization to work properly. I'm looking forward to trying it on my Canon 7D body with my 300mm f/2.8 and 70-200mm 2.8 lenses. If your lighting conditions are sufficient, this is a good alternative to spending the big bucks on the 600mm lenses. It's also much easier to hand hold on a moving boat.

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                          • No

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                          Cases & Straps

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                          LensCoat -  Lens Cover for the Canon Extender Set EF III (Black)
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