REVIEW SNAPSHOT®

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CanonExtender EF 2X III
 
4.5

(based on 354 reviews)

Ratings Distribution

  • 5 Stars

     

    (223)

  • 4 Stars

     

    (99)

  • 3 Stars

     

    (18)

  • 2 Stars

     

    (9)

  • 1 Stars

     

    (5)

94%

of respondents would recommend this to a friend.

Pros

  • Strong construction (167)
  • Easily interchangeable (156)
  • Durable (127)
  • Rugged (108)
  • Consistent output (98)

Cons

  • Poor in low light (68)
  • Slow focus (42)
  • Heavy (23)
  • Blurry focus (12)
  • No increase in performance (3)

Best Uses

  • Wildlife photos (189)
  • Sports/action (109)
  • Landscape/scenery (93)
  • Shooting outdoors (67)
  • Weddings (24)
    • Reviewer Profile:
    • Photo enthusiast (107), Semi-pro photographer (86), Pro photographer (36), Tech savvy (29), Casual photographer (14)
    • Was this a gift?:
    • No (302), 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 354 customers

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Displaying reviews 1-20

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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

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    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

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      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

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        (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

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          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

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          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

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            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.

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                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

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                  (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.

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                        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

                             
                            5.0

                            Great item

                            By blitzer

                            from worldwide

                            Comments about Canon Extender EF 2X III:

                            very quick, sharp, and a much cheaper and smaller alternative to buying another telephoto lens. Allows for a wide variety of focal lengths and versatility without the extra bulk and weight of more glass. While it's not a big lens replacement by any means, it is a great item and option to have.

                            Share this review

                             
                            5.0

                            Great for some long distance shots

                            By Lenny

                            from South Carolina

                            About Me Semi-pro Photographer

                            Verified Buyer

                            Pros

                            • Durable
                            • Easily Interchangeable
                            • Rugged
                            • Strong Construction

                            Cons

                            • Heavy
                            • Poor in Low Light

                            Best Uses

                            • Landscape/Scenery
                            • Wildlife Photos

                            Comments about Canon Extender EF 2X III:

                            I use this to do wildlife shots. No problems using it outdoors.

                            • Was this a gift?:
                            • No

                            Share this review

                            (2 of 4 customers found this review helpful)

                             
                            2.0

                            Mixed feelings about this product

                            By JimB

                            from Coronado, CA

                            About Me Photo Enthusiast

                            Verified Buyer

                            Pros

                            • Easily Interchangeable
                            • Lightweight

                            Cons

                            • Poor in Low Light

                            Best Uses

                            • Wildlife Photos

                            Comments about Canon Extender EF 2X III:

                            The problem here is the specifications. If you read the B&H and Canon websites, they talk about the lenses that this product is compatible with. The problem is that it is not totally compatible with all Canon EOS cameras in that some camera bodies (in my case the EOS 6D) will not autofocus with the 2X, but according to tech support the 1.4X will. There is a statement about reading the lens/camera manual for autofocus instructions. The fact that you cannot autofocus through all EOS cameras and which specific bodies are affected, should be listed prominently in the specification.You can still use this product with the focus AND stabilization set to OFF, but I think my stabilization on my 70-200mm lens was damaged before tech support told me to turn it off.

                            • Was this a gift?:
                            • No

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                            (1 of 1 customers found this review helpful)

                             
                            5.0

                            Canon Extender

                            By Charles D

                            from Knoxville

                            About Me Photo Enthusiast

                            Verified Buyer

                            Pros

                            • Consistent Output
                            • Durable
                            • Easily Interchangeable
                            • Strong Construction

                            Cons

                              Best Uses

                              • Landscape/Scenery
                              • Wildlife Photos

                              Comments about Canon Extender EF 2X III:

                              I use the extender on a 100-400mm L lens. The pictures I took are very sharp and the color is excellent. The only complaint is the price. Not understanding why it cost so much.

                              • Was this a gift?:
                              • No

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