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Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses


Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses



Extending a lenses focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender; features careful lens placement and coatings to minimize ghosting and flare and even has a new Fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.

  • Focal Length & Maximum Aperture Magnification: 1.4x
  • Lens Construction of 7 elements in 3 groups
  • Max. Diameter x Length – 2.8″ x 1.1″ (72.0mm x 27.2mm)
  • Weight – 7.9 oz (225g)

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What customers say about Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses Reviews?

  1. 341 of 372 people found the following review helpful
    4.0 out of 5 stars
    To work well this requires good light, fast lenses, new processors, little cropping and small prints, July 29, 2012
    By 
    I. Giles (Argyll, Scotland) –
    (TOP 100 REVIEWER)
      
    (REAL NAME)
      

    This review is from: Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses (Camera)

    A starting consideration:
    It stands to reason that an extender at a few hundred pounds cannot possibly do anything like the job of a longer lens costing thousands of pounds.
    If it did then Canon would soon be out of business!

    So exactly what is on offer here and what is not?
    A considered and truthful opinion from a professional photographer and his supplier.
    Not everyone will be bothered by these professional provisos but everyone should understand the issues before considering purchase as follows:

    ……………………

    Firstly the hard facts:

    1. This extender loses one stop of light which means that only 1/2 of the normal light from the lens will reach the sensor
    2. Only series 1 cameras will only give auto focus at basic f8.0 or wider which means that the slowest lens possible for auto focus will be f5.6
    3. Non-series 1 cameras will only give auto focus at basic f5.6 or wider which means that the slowest lens possible for auto focus will be f4.0
    4. Both the f4.0 or f5.6 basic apertures with the extender fitted will increasingly be relatively slow to latch on to focus in less than good light

    [...] gives in-depth reviews of all lenses and full explanations of the above facts.

    ………………………………………..
    My professional experience

    This extender was bought primarily to extend the use of the 300mm F2.8 and the 70-200mm F.8 lenses. I had previously owned the original version of this extender and then the Mark 2. This Mark 3 continues the improvement although it must be said that differences are slight and you need large images to fully see any real change. All three extenders have real matters of compromise to consider and these apply to this latest model too.

    The real issue concerns the loss of image quality and performance compared to full-length lenses and whether such losses are acceptable enough for the purchaser’s purposes. I am not so sure that the difference between the mark 2 and this mark 3 will be readily apparent except under the most demanding circumstances coupled with cropping. Simply upgrading may not be worthwhile compared to buying this extender for the first time.

    The intended advantage of using this extender with lenses constructed with wide enough open apertures is that you get greater magnification with full automatic features but at a much lower total weight (and cost) of buying another lens. The performance, flexibility and ease of use thus gained is supposed to be such that this works out as a useful piece of kit. The losses to consider are lower shutter speed, image searching and potential loss of image quality in large prints.

    Most effective use is rather limited to bright conditions for reasons of speed and focus. Conditions in the USA may therefore be more suitable than in the UK for example and safari holidays may also be suitable uses for the same reason.

    As a result I have found that I use it only very rarely and only then in particularly favourable lighting conditions and as a last option. I have never found the final image to be of sufficient quality to be useful professionally. In reality it really only works well enough to be considered professionally with fast F 2.8 lenses. However, professionals would nearly always choose to use a longer lens because the loss of performance with the extender makes images too doubtful for commercial use.

    A longer lens will always out-perform this extender coupled with a shorter lens, quite markedly in poor light conditions, and will always be the choice of professionals and very keen amateurs. However longer lenses cost more, are heavier and simply more to carry about so this extender is useful as a fall-back option for occasional extra reach but at some cost of quality and operating performance. It should be noted that this short extender is far more effective than the 2 x extender which is very much more compromised in all the same ways.

    …………………………………….
    My professional supplier’s opinion

    I discussed this extender with my professional supplier on behalf of an enquirer not using my equipment and this was his considered advice:

    1. The loss of a stop makes this a slower lens so an 100-400 f4.0-5.6 lens becomes f5.6 – 8.0 for example
    2. Autofocus loss or prolonged searching can become an issue with lenses slower than f2.8 especially in low light
    3. This loss means that good light becomes very important and a futher limiting factor
    4. Cropping will exaggerate loss of sharpness. Large crops do more damage than small crops
    5. Large images, especially in print form, will exaggerate loss of sharpness
    6. Older camera models with older processors are less able to handle the increase of digital noise
    7. Cameras with less than full frame imaging will exaggerate loss…

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  2. 96 of 102 people found the following review helpful
    5.0 out of 5 stars
    New Canon EF 1.4 III Lens Extender, April 1, 2011
    By 

    Verified Purchase(What’s this?)
    This review is from: Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses (Camera)
    I am very pleased with my new type III lens extender. It is made for a select group of Canon lenses. Before ordering one for your camera body, consult this list! With my 70-200mm f4L lens this extender works very well. I plan to take this lens set up with me to Alaska this summer. It should have the reach that I need. Keep in mind that with this combination, my lens is now f5.6, one stop slower. I still retain IS and fairly rapid AF. I just don’t plan to shoot at late dusk with it. Like my zoom lens, this extender is weather sealed at the connections. The additional cost of this extender for my zoom lens gives me the versatility without the greater cost of purchasing a new 400 or 500mm L series lens. My lens set up now has a length of 7 inches and not much extra weight. Matched with my 40D camera body, I can tote this weight around all day.

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