REVIEW SNAPSHOT®

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CanonExtender EF 2X III
 
4.5

(based on 413 reviews)

Ratings Distribution

  • 5 Stars

     

    (263)

  • 4 Stars

     

    (109)

  • 3 Stars

     

    (22)

  • 2 Stars

     

    (12)

  • 1 Stars

     

    (7)

93%

of respondents would recommend this to a friend.

Pros

  • Strong construction (201)
  • Easily interchangeable (184)
  • Durable (148)
  • Rugged (120)
  • Consistent output (117)

Cons

  • Poor in low light (75)
  • Slow focus (49)
  • Heavy (29)
  • Blurry focus (14)
  • No increase in performance (3)

Best Uses

  • Wildlife photos (221)
  • Sports/action (130)
  • Landscape/scenery (110)
  • Shooting outdoors (67)
  • Weddings (26)
    • Reviewer Profile:
    • Photo enthusiast (120), Semi-pro photographer (105), Pro photographer (43), Tech savvy (29), Casual photographer (17)
    • Was this a gift?:
    • No (345), 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 413 customers

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(1 of 1 customers found this review helpful)

 
5.0

Great choice, works exactly as described.

By Sunseeker 01

from Toronto, Canada

Verified Buyer

Comments about Canon Extender EF 2X III:

I purchased this 2X extender to use with my Canon 6D and my 70-200 mm 2.8 zoom. My intended use is for wildlife photography (planning a Safari), and since I got it, I have primarily been experimenting with it and learning how to use it with birds in my back yard. I spent 2 days taking photographs of planes in flight at a recent airshow, testing focus tracking.

Overall I am very impressed with this product. It works exactly as advertised. I don't seem to have lost any focusing functionality, all modes and all focus points work. I read that focusing time is slower than with the native lens, but I have to say, I find it focuses very fast in most instances, and I am pleased with its overall performance. I am sure that there are people who will feel that there are significant reductions in optical performance compared to other lenses, but I really wanted the versatility of a fast 70-200 zoom AND a 400 mm option. At 400 mm and 5.6 the combo is still pretty fast, and the weight and acquisition cost of the extender compared to say the 100-400 zoom (loose the 2.8 capacity up to 200mm), or a native 300 or 400 fast prime made the most sense to me. I can carry it with me and I have 2 lenses for minimal incremental cost and weight.

Overall, I am very impressed with the quality of the build, and the images that I get with this product. I would highly recommend it as described above.

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5.0

Best Extender

By Joseph

from Undisclosed

Comments about Canon Extender EF 2X III:

The Canon extender performs better than any other I have used. It is specially designed for Canon long lenses. At certain focal distances you have to manually focus but that is no problem if you have adjusted the diopeter on your viewfinder for your eyes. You can also use live view.

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5.0

Works with No Issues

By dmb01golf

from Phoenix,AZ

Verified Buyer

Comments about Canon Extender EF 2X III:

I bought this to couple with my Canon 7D Mark ii and 70-200mm IS f/2.8 ii. It works really well and the auto focus is great. I also have a Swarovski 20-60X STS 80 and I do believe that the Swarovski is better for video, but for stills the Canon rules no questions asked. A tripod is necessary but I love the 70-200mm lens. I am in the desert a lot and the heat waves are the main distortion, so having a bigger aperture to stop the waves keeps the picture clearer. Zero regrets. I did read back and forth about the 1.4x-1.6x was better, but i am no professional, but it comes out great for me. Below I left a comparison at 900y away, yes 900y to show the grains. The 2X was taken a different day, but around the same time during the night.

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(5 of 10 customers found this review helpful)

 
2.0

EF 2X III EXTENDER REVIEW BY EXPERIENCED NATURE PHOTOGRAPHER

By Louis Balboa

from NJ

Verified Buyer

Comments about Canon Extender EF 2X III:

I used this extender mounted between a Canon 1Dx MII and a L series 800mm lens. I tried the extender out for a week at a site I frequent this time a year documenting a nesting pair of Osprey which I post on "Photon Collector's Nature Pix".
Before I bought this extender I researched it and I had a lengthy online chat with a BH's staff member. The write up for this extender claims "superb image quality" but I was truly disappointed. I tried different camera settings but it became obvious I was not going to get the clear detailed images I'm accustomed to. Its a shame because I really wanted this to work. Perhaps it may work better with a different lens but for me it was disappointment from start to end. I sent mine back to BH requesting a refund. BTW this is no knock on BH. They are a great company to deal with and I have spent many thousands of dollars doing business with them.

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(2 of 2 customers found this review helpful)

 
4.0

Far superior to the original EF 2X extender

By Juke Joint Johnny

from Nash Vegas, TN

Verified Buyer

Comments about Canon Extender EF 2X III:

This is a big improvement over the original EF 2X extender. I bought the original many many many years ago, and sold it after using it just a few times. I genuinely stunk. This version III is far better, and when coupled with the latest EF telephotos, it is quite good.

Just remember that when you stick an extender on your long lens, you'd better also put it on a first rate foundation (tripod and head). You lose two stops of light, so your fast f/4 becomes a not so fast f/8, and since the focal length also doubles, the image will be image more difficult to keep sharp if there is any vibration in the foundation. Mirror lock up and remote release will both help.

You're not likely to stick the 2X on your 400 f/5.6 and go for a successful stroll. You need a tripod and solid technique. If you pay attention, the EF 2X III will be a nice addition to your kit. If you buy it as a gadget, you might as well save your money. It will give gadget level performance if not used as a professional tool.

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(9 of 9 customers found this review helpful)

 
5.0

Nice addition to Canon 70-200mm

By Ahjet

from Los Angeles, CA

Verified Buyer

Comments about Canon Extender EF 2X III:

I bought this 2x to my Canon 70-200mm f/2.8L IS II USM Lens. The images are very sharp and focus is very fast.

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(2 of 2 customers found this review helpful)

 
5.0

Great!!

By JB in ATl

from Atlanta, Ga

Comments about Canon Extender EF 2X III:

Not much to say other than it works exactly as it is supposed to. You do lose some perceivable sharpness but that's to be expected. Other than that it is the easiest way to gain twice your focal length.

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(2 of 2 customers found this review helpful)

 
4.0

Great addon.

By Mlow

from California

Comments about Canon Extender EF 2X III:

Bought this along with the 70-200L 2.8 to replace my 70-300L 5.6. I haven't put it through the paces yet but hoping works as stated. Look forward to another great Canon product.

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(5 of 5 customers found this review helpful)

 
5.0

GREAT EXTENDER. NO IMAGE QUALITY LOSS AT ALL

By ERIK RUIZ

from SAN FRANCISCO

About Me Pro Photographer

Verified Buyer

Pros

  • 2X MAGNIFICATION
  • Durable
  • Easily Interchangeable
  • Fast / accurate auto-focus
  • Strong Construction

Cons

  • Heavy

Best Uses

  • Sports/Action
  • Video
  • Wildlife Photos

Comments about Canon Extender EF 2X III:

2X MAGNIFICATION AT NOT IMAGE LOSS!!! THAT'S GREAT!!!!
THE ONLY THING YOU LOSS IS F STOPS BUT YOU GAIN 2X MAGNIFICATION, SO IT'S NOT A BIG DEAL. IT'S A GOOD GEAR COMBINED WITH YOUR CANON TELEPHOTOS.

  • Was this a gift?:
  • No

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(5 of 5 customers found this review helpful)

 
5.0

Excellent add-on to my 70-200 lf/2.8 lens

By Hakim Benkrid

from Allentown, PA

Verified Buyer

Pros

  • Durable
  • Easily Interchangeable
  • Lightweight
  • Nice Bokeh
  • Strong Construction

Cons

    Best Uses

    • Sports/Action
    • Video
    • Wildlife Photos

    Comments about Canon Extender EF 2X III:

    Ttwo reasons why I elected to buy this extender: Price and weight

    • Was this a gift?:
    • No

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    (2 of 2 customers found this review helpful)

     
    5.0

    Great extender

    By Orthorider

    from Minneapolis

    About Me Semi-pro Photographer

    Verified Buyer

    Pros

    • Strong Construction

    Cons

      Best Uses

      • Wildlife Photos

      Comments about Canon Extender EF 2X III:

      Wildlife photos.

      • Was this a gift?:
      • No

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      (14 of 14 customers found this review helpful)

       
      5.0

      Just as sharp as without it! All functionality works!

      By PajamaGuy

      from Wudson, MA

      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
        • Weddings/Events
        • Wildlife Photos

        Comments about Canon Extender EF 2X III:

        With my 7D MkII and my 70-200 L 2.8 IS II, I can get to 400mm. I ran the Dot Tune calibrations on my 70-200 with and without the 2x II and the results are I need ZERO micro focus adjustment. At a cost of only 2 stops, full AF functionality, and no loss of sharpness, this genuine Canon extender is a winner!

        • Was this a gift?:
        • No

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        (2 of 2 customers found this review helpful)

         
        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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          (2 of 4 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 4 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.

            • Was this a gift?:
            • No

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