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Canon Extender EF 1.4x III EF Lens

    Canon Extender EF 1.4x III EF Lens

    Manufacturer: Canon U.S.A., Inc.

    Item #: CAN-EF14XIII   •   MFG #: EXTENDER EF 1.4X III


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    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.

    • Specifications

      • Focal Length & Maximum Aperture Magnification: 1.4x
      • Lens Construction 7 elements in 3 groups
      • Max. Diameter x Length, Weight 2.8 x 1.1 in, 7.9 oz. / 72.0 x 27.2mm, 225g
      • Note: This lens 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.


    by PowerReviews
    CANON U.S.A., INC.Canon Extender EF 1.4x III EF Lens

    (based on 4 reviews)

    Ratings Distribution

    • 5 Stars



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    • 1 Stars




    of respondents would recommend this to a friend.

    Reviewed by 4 customers

    Displaying reviews 1-4

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    For that extra reach!

    By JohnG

    from Austin, TX, United States

    Comments about CANON U.S.A., INC. Canon Extender EF 1.4x III EF Lens:

    While there's much flack about the sharpness of extenders, even the EF 1.4x III, I'd say they were right. But wait!! I saw the same issue when attaching this extender to my 70-200 2.8 L IIâ€"slightly back focused on my 1DX2. The fix is to make AF microadjustments on the camera body to calibrate for AF focus. After fine tuning the adjustments, now razor sharp on both W-T and the AF servo focus is fast. Totally surprised how many photographers are unaware of this critical and necessary AF microadjustment. However, be forewarned, camera menu AF microadjustments are typically not available on Canon consumer type DSLRs. The weather sealing is great, and guess what? This teleconverter also works on my 120-300mm 2.8 zoom too.


    Does not live up to expectations

    By Photogeek

    from North Carolina, United States

    Comments about CANON U.S.A., INC. Canon Extender EF 1.4x III EF Lens:

    I do not recommend this extender as it impacts sharpness. In numerous tests, this extender reduced the sharpness of my EF 70-200mm f/2.8L IS II USM from what I would describe as tack-sharp to "soft". There is no sense in having a 1.4 boost in focal length if the picture is not sharp.


    Not worth the money

    By Charliesnature

    from Portland, OR, United States

    Comments about CANON U.S.A., INC. Canon Extender EF 1.4x III EF Lens:

    I bought the extender to use with a 100-400mm lens and have used it on the old L series and the new L 2. I have used it with a 7d as well as 7d mark 2. The images I have gotten with the extender are very poor. Now the extender seems to have stopped communication with the camera and I get an error message. The messages says to clean the contacts which I have done but to no avail. Not worth the money.

    (1 of 2 customers found this review helpful)


    Disapointed in Canon's product registration

    By Stevez

    from Undisclosed

    Comments about CANON U.S.A., INC. Canon Extender EF 1.4x III EF Lens:

    I love the product, but registration process does not even allow the user to view the serial number and purchase date information that one previously entered. This is very frustrating when doing things like providing information for insurance coverage or opening a support ticket. Fix the registration process, and I'll rate on just the product and raise it up a lot.

    Displaying reviews 1-4

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    Add Accessories for your EXTENDER EF 1.4X III: