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Canon Extender EF 2X III

B&H # CA2XEF3 MFR # 4410B002 Imported
In Stock
Order in the next 00:00:00 hours to ship Today

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
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You Pay: $429.00

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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 358 reviews)

    Ratings Distribution

    • 5 Stars

       

      (226)

    • 4 Stars

       

      (100)

    • 3 Stars

       

      (18)

    • 2 Stars

       

      (9)

    • 1 Stars

       

      (5)

    94%

    of respondents would recommend this to a friend.

    Pros

    • Strong construction (171)
    • Easily interchangeable (159)
    • Durable (128)
    • Rugged (108)
    • Consistent output (100)

    Cons

    • Poor in low light (68)
    • Slow focus (44)
    • Heavy (24)
    • Blurry focus (13)
    • No increase in performance (3)

    Best Uses

    • Wildlife photos (192)
    • Sports/action (111)
    • Landscape/scenery (96)
    • Shooting outdoors (67)
    • Weddings (24)
      • Reviewer Profile:
      • Photo enthusiast (108), Semi-pro photographer (89), Pro photographer (36), Tech savvy (29), Casual photographer (14)
      • Was this a gift?:
      • No (306), 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 358 customers

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    Displaying reviews 1-20

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    5.0

    Sharp as a tack.

    By HuzzahGuy

    from Cleveland, OH

    About Me Photo Enthusiast

    Verified Buyer

    Pros

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

    Cons

      Best Uses

      • Landscape/Scenery
      • Sports/Action
      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      I use this on the 135mm lens and he 100-400mm. The images I get are just as sharp as the underlying lens.

      • Was this a gift?:
      • No

      Share this review

       
      4.0

      this lenx is not good enough if you are ernest

      By Sean

      from NJ

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

      • Lightweight
      • Strong Construction

      Cons

      • Blurry Focus
      • Slow Focus

      Best Uses

      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      A substitute. Try to avoid carrying heavy lens

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      Love it!

      By Shiftysdad

      from IL

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

      • Consistent Output
      • Durable
      • Easily Interchangeable
      • Strong Construction

      Cons

      • Slow Focus

      Best Uses

      • Landscape/Scenery
      • Night Photography

      Comments about Canon Extender EF 2X III:

      Got this item a couple weeks ago. Works fine with my Canon 300mm f2.8L and the new 100-400 f4.5L IS III. Focus is a bit slow at times, but using this for stills and moon photography it's not really an issue. Helps to use the mannual focus ring intially to get in the sweet range, then the auto focus is much quicker.

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      Compraria este producto siempre.

      By carlos

      from Bayamón Puerto Rico

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

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

      Cons

      • Heavy

      Best Uses

      • Landscape/Scenery
      • Sports/Action
      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      Lo uso en conciertos donde necesito un lente de alcance para tomar fotos de cerca. lo mismo este como el 1/4.

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      Canon Extender EF 2X III

      By Bob

      from White Bear Lake, MN

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

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

      Cons

        Best Uses

        • Landscape Photography
        • Wildlife And Bird Photos

        Comments about Canon Extender EF 2X III:

        I am very pleased with the Canon Extender EF 2X III. I use it for extending the range of my Canon f/2.8 70 - 200mm L II USM lens with excellent results. It is very sharp, and gives me an effective 140 - 400mm lens for reaching out to capture images of shore birds.

        • Was this a gift?:
        • No

        Share this review

         
        5.0

        Works like a charm

        By NHBirder

        from NH

        About Me Photo Enthusiast

        Verified Buyer

        Pros

        • Consistent Output
        • Durable

        Cons

          Best Uses

          • Wildlife Photos

          Comments about Canon Extender EF 2X III:

          Bring waterfowl and other critters in closer with this little gem.

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Gets the job done

          By Aj Faulker

          from Detroit

          Comments about Canon Extender EF 2X III:

          Great add on for a 70-200mm f2.8. Still very sharp at 400mm

          Share this review

           
          4.0

          Great for wildlife!

          By Pbcarroll.

          from Pine Bush, NY

          Comments about Canon Extender EF 2X III:

          Getting 2x's closer with my 600 mm while taking shots of wildlife is awesome. The only complaint I have is that you can't change your focal point in auto focus which makes it difficult when you need to focus on an eye.

          Share this review

           
          4.0

          Great piece of equipment!

          By Photo Hunter

          from Anaheim, CA

          About Me Photo Enthusiast

          Verified Buyer

          Pros

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

          Cons

          • Poor in Low Light

          Best Uses

          • Macro Photography
          • Sports/Action
          • Wildlife Photos

          Comments about Canon Extender EF 2X III:

          I bought this to compliment my Canon 70-200mm f/2.8L IS USM and 300mm f/4L IS USM. It works well on the 300mm, yielding sharp images. Doesn't work so well on the 70-200mm due to the zoom. Definitely use on L primes, not zooms for best results.

          • Was this a gift?:
          • No

          Share this review

           
          3.0

          Canon Extender 2X III

          By Chris

          from CT

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Easily Interchangeable
          • Lightweight

          Cons

          • Slow Focus

          Best Uses

          • Landscape/Scenery
          • Wildlife Photos

          Comments about Canon Extender EF 2X III:

          This product works well and does what it says, Only work with Ef mount L series lenses.

          Share this review

           
          4.0

          Extender is what I expected

          By Troy

          from Phoenix, AZ

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Easily Interchangeable

          Cons

            Best Uses

            • Landscape/Scenery
            • Wildlife Photos

            Comments about Canon Extender EF 2X III:

            Too soon to tell. Gave it 4 stars based off a couple quick pics inside. Hand hedd with my 200 mm L lens (now 400) at iso 1000. Picure was of the lens box 20 feet away. Was able to magnify the pic and clearly read the smallest print on the box (font 4 I think) Very good for handheld. Don't like the fact a few f stops are sacrificed. This will perform well on a tripod or in daylight.

            • Was this a gift?:
            • No

            Share this review

            (0 of 1 customers found this review helpful)

             
            5.0

            Great addition to my field shooting pack

            By Bingo

            from Johnson City, TN

            About Me Semi-pro Photographer

            Verified Buyer

            Pros

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

            Cons

              Best Uses

              • Landscape/Scenery
              • Wildlife Photos

              Comments about Canon Extender EF 2X III:

              This 2x extender pairs perfectly with my Canon AF 70-200 F2.8 zoom. Focus response and accuracy have been great with my 5D Mk III. I do a lot of outdoor shooting of wetlands and aquatic settings including detail and abstracts of moving water (creeks, rapids and cascades). Extender is a rugged, lightweight addition to my field pack that adds a lot of valuable flexibility to my shooting verses adding a bulky and heavy 400mm lens. Highly recommended.

              • Was this a gift?:
              • No

              Share this review

               
              4.0

              As expected

              By Rodger

              from Owasso, OK

              About Me Casual Photographer

              Verified Buyer

              Pros

              • Strong Construction

              Cons

              • Poor in Low Light

              Best Uses

              • Wildlife Photos

              Comments about Canon Extender EF 2X III:

              Adds the distance I was wanting to bring in. I have not had the need to use this much yet, but from initial testing it appears to provide the extra extension that was missing on occasion. Definitely a keeper in my carry around bag.

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Up close and personal

              By Deb's photos

              from Ohio

              About Me Semi-pro Photographer

              Verified Buyer

              Pros

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

              Cons

                Best Uses

                • Sports/Action
                • Wildlife Photos

                Comments about Canon Extender EF 2X III:

                I had doubts about using an extender. I just didn't think my images would be as sharp, but they look great! I have been using the extender with my 70-200mm 2.8 lens which is a very heavy combination, but I got by with just a monopod at the zoo and had very sharp images.

                • Was this a gift?:
                • No

                Share this review

                 
                5.0

                A must for bird photography.

                By Allan

                from Boston

                About Me Semi-pro Photographer

                Verified Buyer

                Pros

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

                Cons

                  Best Uses

                  • Sports/Action
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  I take this with me all the time in the field. I doubles my versatility in a tiny package. My 400 mm is also an 800 mm for almost no extra weight or bulk. There is no reason to leave this out of your bag when you are out to bag that bird.

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  4.0

                  Excellent Product

                  By LT

                  from Fort Leonard Wood

                  About Me Photo Enthusiast

                  Verified Buyer

                  Pros

                  • Consistent Output

                  Cons

                    Best Uses

                    • Wildlife Photos

                    Comments about Canon Extender EF 2X III:

                    Works as expected, had rented one for previous shoot. Be aware AF does not work on most cameras.

                    Share this review

                     
                    5.0

                    Love extender

                    By rc

                    from wichita

                    About Me Photo Enthusiast

                    Verified Buyer

                    Pros

                    • Consistent Output
                    • Easily Interchangeable
                    • Lightweight
                    • Strong Construction

                    Cons

                      Best Uses

                      • Landscape/Scenery
                      • Wildlife Photos

                      Comments about Canon Extender EF 2X III:

                      Very pleased with the results.

                      • Was this a gift?:
                      • No

                      Share this review

                      (2 of 2 customers found this review helpful)

                       
                      4.0

                      Good with 70-200 f2.8 IS II

                      By luminist

                      from Myrtle Beach, SC

                      About Me Pro Photographer

                      Verified Buyer

                      Pros

                        Cons

                          Best Uses

                            Comments about Canon Extender EF 2X III:

                            I tested the EF 2x III with...
                            5D Mark III, firmware 1.2.3
                            EF 70-200mm f/2.8L IS II USM
                            EF 400mm f/5.6L USM

                            Bottom line: Results with the EF 70-200mm f/2.8L IS II USM were good. Results with the EF 400mm f/5.6L USM were bad--so bad, I threw out all the shots.

                            With the 70-200mm, autofocus and IS worked normally, as if the EF 2x III wasn't there. I hand held all my shots. Details in the central area of frame were crisp with no obvious chromatic aberration. AF was acceptably fast. IS prevented camera shake blurs--and I have really shaky hands. I took home plenty of great shots and was really excited about my new vision of the world at 400mm.

                            But the with EF 400mm f/5.6L USM, results were, to say the least, disappointing. I was fully aware of the limitations using the EF 2x III with an f/5.6 lens which would prevent AF from working. And, of course, the EF 400mm doesn't have IS. So I knew what I was getting into. What I didn't expect were images that were unacceptably soft--and not because of camera shake--and had obvious chromatic aberration. What turned me off most was the ugly bokeh the lens and extender produced. The 400mm bokeh kinda looked geometric without the extender. With it, the extender just amplified it to the point of being a harsh, distracting pattern.

                            I borrowed the EF 400mm f/5.6L USM. I owned the EF 70-200mm f/2.8L IS II USM and gladly bought the Extender EF 2x III to go with it.

                            Share this review

                             
                            5.0

                            Fast shipping

                            By Nature Boy

                            from Batavia ill

                            About Me Photo Enthusiast

                            Verified Buyer

                            Pros

                            • Easily Interchangeable
                            • Strong Construction

                            Cons

                              Best Uses

                              • Wildlife Photos

                              Comments about Canon Extender EF 2X III:

                              Great option to extend your focal reach.

                              • Was this a gift?:
                              • No

                              Share this review

                               
                              5.0

                              nice product

                              By gabriel terres

                              from belo horizonte, mg, brasil

                              About Me Photo Enthusiast

                              Verified Buyer

                              Pros

                              • Durable
                              • Fast / accurate auto-focus

                              Cons

                                Best Uses

                                • Landscape/Scenery
                                • Sports/Action
                                • Wildlife Photos

                                Comments about Canon Extender EF 2X III:

                                great

                                • Was this a gift?:
                                • No

                                Share this review

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                                Cases & Straps

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                                • You Pay: $19.95
                                 

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