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CanonExtender EF 2X III
 
4.5

(based on 401 reviews)

Ratings Distribution

  • 5 Stars

     

    (254)

  • 4 Stars

     

    (107)

  • 3 Stars

     

    (22)

  • 2 Stars

     

    (11)

  • 1 Stars

     

    (7)

93%

of respondents would recommend this to a friend.

Pros

  • Strong construction (197)
  • Easily interchangeable (181)
  • Durable (145)
  • Rugged (119)
  • Consistent output (116)

Cons

  • Poor in low light (75)
  • Slow focus (49)
  • Heavy (28)
  • Blurry focus (14)
  • No increase in performance (3)

Best Uses

  • Wildlife photos (217)
  • Sports/action (127)
  • Landscape/scenery (110)
  • Shooting outdoors (67)
  • Weddings (25)
    • Reviewer Profile:
    • Photo enthusiast (120), Semi-pro photographer (103), Pro photographer (42), Tech savvy (29), Casual photographer (17)
    • Was this a gift?:
    • No (341), Yes (14)

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 401 customers

Displaying reviews 1-20

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5.0

An Improvement

By Oldbluedog

from Arkansas

About Me Photo Enthusiast

Verified Buyer

Pros

  • Consistent Output
  • Durable
  • Rugged
  • Strong Construction

Cons

    Best Uses

    • Landscape/Scenery
    • Sports/Action
    • Wildlife Photos

    Comments about Canon Extender EF 2X III:

    i use this extender exclusively on two Canon products; namely, the 70-200 f2.8 version II and the version II 100-400, primarily on the Canon 7D Mk II. On noth lenses it functions well. Be advised that on the 100-400 auto focus is non-existent.

    • Was this a gift?:
    • No

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    4.0

    Good teleconverter/extender

    By Steve

    from Mill Valley, CA

    About Me Photo Enthusiast

    Verified Buyer

    Pros

    • Easily Interchangeable
    • Lightweight

    Cons

    • Poor in Low Light
    • Slow Focus

    Best Uses

    • Sports/Action
    • Wildlife Photos

    Comments about Canon Extender EF 2X III:

    Useful for wildlife and other shots where it simply isn't in your power to determine how close you can get. Good interchangeable functionality with Canon lenses only. Also will not allow a lens' autofocus function to work, be prepared to *only* use manual focus with this item.

    • Was this a gift?:
    • No

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    (0 of 2 customers found this review helpful)

     
    5.0

    get you close

    By rtkulhaw

    from michigan

    About Me Semi-pro Photographer

    Verified Buyer

    Pros

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

    Cons

    • Heavy

    Best Uses

    • Landscape/Scenery
    • Wildlife Photos

    Comments about Canon Extender EF 2X III:

    does a great job with the 70-200 2.8 great focus ,the 100-400 looses to much to auto focus but still makes great images, rumor is the new 1D will remedy that
    nice to have this in the arsenal

    • Was this a gift?:
    • No

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    5.0

    So far, so good

    By Sfhgospurs

    from Dallas, Texas

    About Me Pro Photographer

    Verified Buyer

    Pros

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

    Cons

      Best Uses

      • Indoors/Low Light
      • Sports/Action

      Comments about Canon Extender EF 2X III:

      Only used it once, for hockey, but was pleased with the results. Arrived when it was supposed to, everything went well.

      • Was this a gift?:
      • No

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      (0 of 3 customers found this review helpful)

       
      2.0

      It is what it says it is

      By Jj

      from Pa

      Comments about Canon Extender EF 2X III:

      Very dissappointed the auto focus doesnt work even though i am using on a Canon lens which is supposed to be compatible. I googled the problem and apparantly this is common. There is a trick to apply but it has very limited results. I will be returning as it is not what it is advertised to be

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      4.0

      good addition to telephoto lens

      By Carloo

      from Boulder, CO

      About Me Pro Photographer

      Verified Buyer

      Pros

      • Durable
      • Easily Interchangeable
      • Lightweight
      • Strong Construction

      Cons

      • Poor in Low Light
      • Slow Focus

      Best Uses

      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      This was a great addition to my 300mm lens to photograph sandhill cranes

      • Was this a gift?:
      • No

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      (1 of 1 customers found this review helpful)

       
      5.0

      Beautiful extension of a lens.

      By Ralock360

      from New Hampshire

      Comments about Canon Extender EF 2X III:

      This lens does exactly what it says it does. Great for getting closer to my subject without spending all that much.

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      (1 of 1 customers found this review helpful)

       
      5.0

      Sharper than I expected

      By Quabbin Wanderer

      from Athol, Massachusetts

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

      • Quality Glass
      • Strong Construction

      Cons

      • None

      Best Uses

      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      You see postings about extenders causing some image degradation but I found the EF2X III from Canon to be much sharper than I expected. I had my first nature shoot with this attached to my EF300mm IS II and was very pleased with the images as I pulled them up in my image editing software. Of course the 300mm is a extremely sharp lens to start with. It does slow autofocus a little and you lose 2 stops of light. Little to give up to achieve 600mm though.

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      • No

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      (1 of 1 customers found this review helpful)

       
      5.0

      No problems at all..

      By The Old Guy

      from Lakeside, California

      About Me Pro Photographer

      Verified Buyer

      Pros

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

      Cons

        Best Uses

        • Wildlife Photos

        Comments about Canon Extender EF 2X III:

        Purchase to use with my 7d MKII on 500 f4 and every thing went great. No problems at all.
        .Recomended

        • Was this a gift?:
        • No

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        (0 of 2 customers found this review helpful)

         
        5.0

        like so far But

        By LarryB

        from Bangor, ME Melbourne, FL

        About Me Photo Enthusiast

        Verified Buyer

        Pros

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

        Cons

          Best Uses

          • Landscape/Scenery
          • Wildlife Photos

          Comments about Canon Extender EF 2X III:

          like most who have this extender I am very pleased with it.. Beyond the magnification aspect I purchased it to try to test my EF L IS 70 - 200. I am having a terrible issue with poor focus at distance over 50' with my 7D MarkII and that lens. I almost never get a clear image so I was hoping the extender might give me some additional input in solving the problem I think it has helped and maybe served to improve the focus issue....I think a call to Canon will have to be next....

          • Was this a gift?:
          • No

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          (6 of 8 customers found this review helpful)

           
          4.0

          Canon EF 100-400mm IS-2 with 2X III good enough?

          By oarsman

          from upstate NY

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Easily Interchangeable
          • Lightweight

          Cons

            Best Uses

            • Sports/Action
            • Wildlife Photos

            Comments about Canon Extender EF 2X III:

            Entry into the long telephoto arena is very costly (10-12K for 500 or 600mm IS-2) and for many is not frequently needed. As an owner of several Canon lenses (300mm f4/L is, 100-400mm is-1, 400 f/5.6L and 100-400mm IS-2)I noted photos with the 1.4xIII extender were good with both the 300mm f/4L is and the latest IS-2 400mm zoom. Before spending 5-6k for a heavy used 500mm is-1, I elected to purchase 2x extender for a trial. The 300mm is-1 was satisfactory with the 2x and permitted autofocus but was not as sharp as the 400mm IS-2. The old 100-400 zoom and the 400 f5.6 were not acceptable with the 2x extender. My surprise was the new 100-400 IS-2 zoom was quite sharp with the 2X adaptor. There is no autofocus at f/11 but manual focus worked well enough for me. I suggest turning the tripod mount straight up to get the foot out of the way when manually focusing. I know this may not be as sharp as the 500mm IS-2 with the 2x but I found this combination more than good enough for me (serious amateur but not a pro). What I miss in absolute quality will be made up by ease of use and easy portability of the zoom lense. So before spending big bucks, try your lenses out with the 2X adaptor first. It may save your pocket book a big bundle and your back will love you also. In an era of ever increasing camera sensor sensitivity, a good telephoto may not have to be a huge lense.

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            • No

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            (5 of 5 customers found this review helpful)

             
            5.0

            Awesome buy

            By t5dmark3h

            from Simi Valley, California

            Comments about Canon Extender EF 2X III:

            I bought this 2x mark3 to use with my 70-200mm L 2.8 II and I'm very satisfied with the performance of this extender. I use it with the 5d mark 2, all 9 focus points work flawlessly. I haven't tried with 5d mark 3 yet. The image is very sharp and focus is very fast. The built quality is excellent. So far no complaints for me.

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            (1 of 4 customers found this review helpful)

             
            3.0

            Close up

            By Ray S

            from Decatur IL USA

            About Me Casual Photographer

            Verified Buyer

            Pros

            • Consistent Output
            • Strong Construction

            Cons

            • Heavy
            • Poor in Low Light
            • Tough To Attach

            Best Uses

            • Wildlife Photos

            Comments about Canon Extender EF 2X III:

            Wont work with (white box) adjustable lenses, only (red dot) lenses. Doubles magnification, definitely requires tripod and remote shutter control, no movement at all to get a clear picture. Wildlife photos.

            • Was this a gift?:
            • No

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            (1 of 11 customers found this review helpful)

             
            1.0

            False advertising - manual focus

            By Sign Guy

            from Everett, WA

            About Me Semi-pro Photographer

            Verified Reviewer

            Pros

            • Easily Interchangeable
            • Strong Construction

            Cons

            • Heavy

            Best Uses

              Comments about Canon Extender EF 2X III:

              I wanted this for wildlife. It says it communicates between lens and camera and it doesn't work the way it was advertised. I use it with the EF 100-400mm f/4.5-5.6L IS USM lens and now I see it will not auto focus. When I purchased it, this information (auto focus) was not available but said it was compatible with the lens. The communication and auto focus is what I wanted and feel I just wasted my money.

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              • No

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              5.0

              Very surprised by image quality!

              By Olsonimagery

              from Burnsville, MN

              Comments about Canon Extender EF 2X III:

              A major step up from the previous version. Very happy with the image quality when coupled with my 400mm f/2.8

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              (2 of 2 customers found this review helpful)

               
              5.0

              Perfect!

              By Tim S.

              from North Carolina

              About Me Pro Photographer

              Verified Buyer

              Pros

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

              Cons

                Best Uses

                • Landscape/Scenery
                • Sports/Action
                • Wildlife Photos

                Comments about Canon Extender EF 2X III:

                I use with 70-200mm, 2.8, it is made to fit any telephoto lens
                will not fit anything shorter- it's not made to double your 50mm lens.
                It feels very sturdy- it is heavier than I expected (but has 9 elements). And is definitely lighter than a 400mm.

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                • No

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                (2 of 2 customers found this review helpful)

                 
                5.0

                Outstanding Extender!

                By EVPhotography

                from Eagle Mountain, Utah

                About Me Photo Enthusiast

                Verified Buyer

                Pros

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

                Cons

                  Best Uses

                  • Sports/Action
                  • Wildlife Photos

                  Comments about Canon Extender EF 2X III:

                  Recently rented one of these for a trip I took to Bosque de Apache and I must say I was very impressed on how well it worked and how sharp my images were. I used it with my Canon 400 DO IS II I got excellent results. I know a lot of photographers will complain that you can't get sharp images with 2X extender, but I know now they are totally wrong. I was also surprised at how well my lens autofocusing worked with it. You will lose some autofocusing speed when using one, but I didn't have any problems following birds in flight. Soon as I got back from my trip, I ordered one. Love it!!

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                  • No

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                  (1 of 12 customers found this review helpful)

                   
                  1.0

                  Not to sure about the extender

                  By KGR

                  from Dusty Washington

                  Comments about Canon Extender EF 2X III:

                  So far not very impressed thinking about returning it

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                  5.0

                  Works Very Well

                  By Joekodak

                  from Port Orange, FL

                  About Me Pro Photographer

                  Verified Buyer

                  Pros

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

                  Cons

                    Best Uses

                    • Sports/Action
                    • Wildlife Photos

                    Comments about Canon Extender EF 2X III:

                    I'm using this between my 5DMkiii and original EF 70-200 f/2.8 L. Intended use is for nature and sports photos. I wanted extra focal length and this was a good compromise, price wise. I debated a dedicated Canon or Sigma zoom lens for quite a while but settled on the Canon Extender instead. I'm happy with it.

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                    • No

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                    (3 of 3 customers found this review helpful)

                     
                    5.0

                    highly recommended

                    By Ballhawg

                    from Atlanta, GA

                    About Me Photo Enthusiast

                    Verified Buyer

                    Pros

                    • Consistent Output
                    • Rugged
                    • Strong Construction

                    Cons

                      Best Uses

                      • Landscape/Scenery
                      • Wildlife Photos

                      Comments about Canon Extender EF 2X III:

                      I travel by plane quite often and 2X III allows me to carry a 70-200mm lens and still get the 400mm reach without the weight of my 100-400mm lens. Some sharp images without a tripod in many cases.

                      • Was this a gift?:
                      • No

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