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

4.5 4.5 out of 5 stars 367 ratings
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Amazon's Choice in SLR Camera Lenses by Canon

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Purchase options and add-ons

Brand Canon
Focal Length Description 1.4x Extender III for Canon EF
Lens Type Telephoto
Compatible Mountings Canon EF
Camera Lens Description 7

About this item

  • 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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SERIAL #0460001310 FULL 14 DAY SATISFACTION GUARANTEE AND A 90 DAY PARTS AND LABOR WARRANTY.

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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
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Price$429.00$572.60$649.00-10% $383.50
New Price:$429.00
$429.00-12% $378.49
New Price:$429.00
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Customer Ratings
Auto focus
4.6
4.5
4.0
3.6
Picture quality
4.6
4.5
3.8
4.2
Value for money
4.6
4.6
4.2
Sold By
Amazon.com
Amazon.com
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Amazon.com
6ave
lens type
Telephoto
Teleconverter
Telephoto
Telephoto
Telephoto
Telephoto
compatible mountings
Canon EF
Canon RF
Canon EF
Canon EF
Canon EF
lens design
Prime
Prime
Zoom
Zoom
Prime
Prime
focus type
Auto Focus
Auto Focus
Auto Focus
Auto Focus
Auto Focus
Auto Focus
minimum focal length
800 millimeters
100 millimeters
2 millimeters
1 millimeters
max focal length
1120 millimeters
2 millimeters
1 millimeters
fixed focal length
30 millimeters
85 millimeters
400 millimeters
135 millimeters
2 millimeters
model name
4409B002
Canon EXTENDER RF 1.4x
CNRF100400F5
4410B002-cr
extender ef
ef

From the manufacturer

-

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

Description:

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. The Fluorine coating resists soiling, smears and fingerprints. Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.

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


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Product Description

Product Description

Extending a lens' focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performances 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 no only optically, but also in terms of rugged, dustproof and water resistant construction.

From the Manufacturer

Extending a lens's focal length by a factor of 1.4x, the 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.

Technical Specifications

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

What's in the box

  • Lens
  • Product guides and documents

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    367 global ratings

    Customers say

    Customers like the quality, versatility, and value of the lens. For example, they say it works well with their EF lens, and provides great results. Customers are also impresseded with the sharpness of the pictures, saying it helps to get a sharper photo. They mention that the construction is excellent, and the glass is of high quality. As for the value, they call it a smart buy. Opinions are mixed on autofocus.

    AI-generated from the text of customer reviews

    73 customers mention62 positive11 negative

    Customers like the compatibility of the lens. For example, they say it works well with their Canon lens, provides great results, and extends the range quite a bit. Some mention that it works perfectly with the EF lens series and has very little performance degradation compared to a true 300mm lens. Overall, most are happy with the performance and functionality of the product.

    "...As for the use of this, it works perfectly with the EF lens series. I can also verify that it works with the RF-EF adapter on the mirrorless cameras...." Read more

    "...Works well, and glad I have it. Easier than carrying around my Tamron 600mm weight wise, although it does add a bit of forward weight...." Read more

    "...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...." Read more

    "...I have no issues with af in single or continuous shoot modes. Works great!" Read more

    64 customers mention53 positive11 negative

    Customers like the image quality of the adapter. They mention that it helps to get a sharper photo, has nice clear optics, and has no noticeable aberration or image degradation. Some say that the adaptor looks very nice and feels sturdy and well made. Overall, customers are happy with the sharpness and quality of their photos.

    "...Design: As with everything with Canon, these are really well designed and work perfectly...." Read more

    "...tripod and yes when pixel peeping this adapter does in fact help to get a sharper photo vs a 40% crop down...." Read more

    "...Autofocus works great and IQ is great.2) As I said in my original review, I **expected** to lose AF with my Canon EF 400mm f5.6/L lens...." Read more

    "The product is as described and was delivered on time. Nice clear optics with no noticeable aberration or image degradation...." Read more

    31 customers mention27 positive4 negative

    Customers like the quality of the lens extender. They say it is a high quality extender, with good solid glass. They also mention that it extends the length of professional quality Canon L lenses with little or no noticeable change. Customers also say that it is top flight equipment.

    "...It is light but still has some good weight to it so you can feel the quality construction...." Read more

    "...PROS: Extends the length of professional quality Canon L Lenses with little or no noticable degredation in image quality...." Read more

    "...AF performance is the same (with this lens), but I do like the build quality better...." Read more

    "...The product looked very nice and felt sturdy and well made...." Read more

    24 customers mention19 positive5 negative

    Customers like the value of the lens. They say it's a great buy, well worth the money, and a smart buy. Some mention that it'll be a nice addition to their camera.

    "...I think it was worth the upgrade after seeing the additional resolution it offers. I am very happy with it." Read more

    "...able to use it on the 5D Mark III makes it a positive purchase, well worth the money!" Read more

    "...So I bit the bullet and got it. I have to say it is awesome...." Read more

    "...But this one, the ext III is truly awesome. I just bought the Canon 300mm f4 IS USM...." Read more

    11 customers mention11 positive0 negative

    Customers like the versatility of the lens. They say it's an excellent addition to their photo gear, makes a great addition to the camera bag, and is a handy addition to any kit. Customers also mention that it'll enhance their camera bag immensely, and can be used for bird photography and moon shots.

    "...This is really an excellent addition to my photo gear." Read more

    "This works wonderful with my Canon 500mm! It makes a great addition to the camera bag, making my 500mm into a 700mm, which is great when you need..." Read more

    "It is good for moon shots." Read more

    "The Extender is a great addition to my backpack...." Read more

    8 customers mention6 positive2 negative

    Customers like the weight of the camera lens. They say it's light but still has some good weight to it, making it easy to bring along in a bag. Customers also mention that it takes very little space in their bag but is there when they need it.

    "...It is light but still has some good weight to it so you can feel the quality construction...." Read more

    "...Yes, I lose a stop...but it's SOOOO much lighter and easier to pack than a 300 2.8L.Do they compare?..." Read more

    "...around my Tamron 600mm weight wise, although it does add a bit of forward weight. For the $, I'd say it's a good choice for me...." Read more

    "...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." Read more

    44 customers mention27 positive17 negative

    Customers are mixed about the autofocus of the lens. Some mention that it's fast and works well, while others say that it causes them to lose autofocus. The autofocus speed isn't noticably impacted by the extender vs lens alone.

    "...Autofocus works great and IQ is great.2) As I said in my original review, I **expected** to lose AF with my Canon EF 400mm f5.6/L lens...." Read more

    "...Below are my findings.1. All three extenders had no problem with auto-focus in my system without any obvious difference...." Read more

    "...Focus did slow down in low light on all the cameras I tested, but honestly, it wasn't that bad...." Read more

    "...I'm an amateur, but I felt/feel the auto-focus is fast, and the photos appear clear...." Read more

    6 customers mention0 positive6 negative

    Customers are dissatisfied with the fit of the lens. They mention that it doesn't fit their lenses, it only fits certain long-fl lenses and zoom lenses, and it doesn’t work with their everyday lenses. Some customers also mention that the lens is only compatible with fixed focal length L-series lenses 135mm and over.

    "...From the Canon USA website: Note: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-..." Read more

    "...an EF 100mm f/2.8 (I know, I just wanted to see), and it just would not fit the lens...." Read more

    "...is what Canon's website states: Note: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-..." Read more

    "Only fits certain long fl lenses and zoom lenses, but not all. That was a disappointment and I'm considering sending it back...." Read more

    Well Worth the Money but a Balancing Act With Light
    5 Stars
    Well Worth the Money but a Balancing Act With Light
    This review is based on use with a Canon EOS 5D mark IV and the Canon EF 100-400mm f/4.5-5.6 L IS USM II lens. The Canon EF 1.4X III Telephoto Extender gives this lens a max of 560mm f/8, so you loose one full stop. To put that in perspective, from f/5.6 to f/8 (one full stop), you are only getting 1/2 of the light that you were getting at f/5.6. For me, there was a slight learning curve and it took some fiddling with settings to get good exposure in lower lighting.The day I got this, it was one of those overcast days where the sun just looks like a smudge in the sky, but I just didn't want to wait for better conditions, and really, why should I? It was a pretty good test actually. Five of the shots I've attached were taken that day; the Downy Woodpecker (shot 2), two of the Eastern Bluebirds (shots 3 & 4), the Dove (shot 5), and the Tufted Titmouse (shot 6). My settings ranged from 1/200th shutter / ISO 1200 to 1/1000th shutter / ISO 800, and the darker images were at f/8. Most were taken under 60 feet away with the flying birds being over 150 feet +/-. All shots have been cropped to various degrees, but generally, I crop about 50% of the pixels away.There is a wee bit of IQ loss, but nothing that you will notice on prints from 11x17"ish below and for general use, like Facebook, forums, and other places you might want to post images, even high quality. Once you convert to JPeG or other "lossy" formats, it's a moot point anyway. I am a "pixel peeper" so I did notice some IQ loss when zoomed past 100%, but honestly, how many people do that?. I don't see any color fringing or vignetting , even though that has been reported, however, I seem to concentrate on the subject, which I know will be cropped, so if it is indeed there, it's of no concern to me. I tested it, using the mentioned 100-400mm lens, on the 5D mark IV, the 7D mark II (See revision), and the Rebel T7i. All focus points worked on the 5D mark IV and Rebel T7i, but only the two center focus points worked on the 7D mark II. I tested in outside lighting that wasn't optimal. I was really surprised because reviewers have stated that you loose some peripheral focus points. Focus did slow down in low light on all the cameras I tested, but honestly, it wasn't that bad. Good lighting was a different story, all cameras AF was snappy as usual. Now, when Canon says the Canon EF 1.4X III Telephoto Extender will only work with certain lenses, it has nothing to do with optics or light, it just plain wont fit other lenses. For the heck of it, I tried to attach it to an EF 70-300mm f/4-5.6 L IS USM II, an EF 70-300mm f/4-5.6 IS USM II (non L), and an EF 100mm f/2.8 (I know, I just wanted to see), and it just would not fit the lens. The front element of the Canon EF 1.4X III Telephoto Extender went too far into the lens to allow it to attach.This device will not replace a dedicated long lens, but it will sure improve your reach with very little loss in IQ. You just have to pick your lighting battles.**EDIT August 28, 2019** My initial review stated that the EOS 7D mark II retained all focus points and though I can't explain how I missed that, you DO loose all but the CENTER TWO focus points with the 7D2, EF 100-400mm L II and this extender, i.e., the center focus point and the smaller one inside of it. You can toggle between these two, but no others are available. I suspect it's a sensor and firmware issue because the cheaper Rebel T7i has no problem dropping focus points with this combo.I sincerely apologize if I've misled owners of the EOS 7D mark II.
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    Top reviews from the United States

    Reviewed in the United States on December 5, 2019
    Customer image
    5.0 out of 5 stars WARNIING: Have to do one thing when you get this for good photos
    Reviewed in the United States on December 5, 2019
    As an amateur photographer who lives in Alaska and loves to shoot wildlife I was wanting this badly and finally grabbed it right before I went on a bear viewing trip.

    Design: As with everything with Canon, these are really well designed and work perfectly. They even updated the color on these to help them match better with the newer version of the 70-200 and the 100-400, so that is a nice bonus. It is light but still has some good weight to it so you can feel the quality construction.

    As for the use of this, it works perfectly with the EF lens series. I can also verify that it works with the RF-EF adapter on the mirrorless cameras. REMEMBER THAT THIS WILL MOVE EVERYTHING UP ONE STOP ON THE CAMERA and EFFECTS THE AUTOFOCUS POINTS.

    MICRO-ADJUST THE CAMERA TO ENSURE BEST FOCUS or, like me, your photos will just seem to be slightly soft on focus

    Cost: I purchased it for $340, currently $429

    Overall: I am a Canon equipment user and this is just another in a long line of great products

    Positives:
    ++Cost (but I got it almost 25% off)
    ++Design

    Negatives:
    --Autofocus effects
    --F-Stop adjustment

    Would I recommend: Absolutely/Borderline. Absolutely I would buy it again, borderline if you are not sure what to do with the other settings on your camera.

    Photos attached with the adapter on
    Images in this review
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    41 people found this helpful
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    Reviewed in the United States on December 14, 2020
    Reviewed in the United States on June 21, 2021
    One person found this helpful
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    Reviewed in the United States on July 22, 2011
    27 people found this helpful
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    Top reviews from other countries

    Amazon Customer
    5.0 out of 5 stars worked well with lens
    Reviewed in Canada on March 24, 2024
    dpsisi
    2.0 out of 5 stars Canon EF 1.4X III Super Telephoto Lenses Extender
    Reviewed in India on October 28, 2019
    One person found this helpful
    Report
    Polar Guy
    5.0 out of 5 stars Wow changes the reach greatly
    Reviewed in Canada on March 8, 2024
    Placeholder
    4.0 out of 5 stars very usefull
    Reviewed in India on December 26, 2018
    One person found this helpful
    Report
    Suhas
    5.0 out of 5 stars Extremely useful, must buy...
    Reviewed in India on September 20, 2018
    Customer image
    Suhas
    5.0 out of 5 stars Extremely useful, must buy...
    Reviewed in India on September 20, 2018
    Most people I have talked to advised me against using any TeleConvertor or Extender, as it seems it reduces image quality significantly.

    However, I wanted to test it out myself (as I was looking for additional reach for my EF 100-400 F/4.5-5.6 L IS II Lens). The 100-400 is an incredibly sharp lens with f/5.6 @ 400 mm. Using this Extender drops the F-stop to f/8. When I used the combo on the field, I was actually blown away by the image quality produced. Sure, there is a slight drop in image quality (as expected), the F-stop reduces by 1 stop (from f/5.6 to f/8), and Auto-Focus becomes a bit slower, but the reach is expanded (400 mm to 560 mm).

    Additionally, when compared side by side, an image @ 400 mm cropped to half (remember with 1.4x extender, the image gets 2 times bigger) against an image @ 560 mm did not show any difference in quality. Both images were crisp and sharp, with all details visible. Attached are 2 images for comparison. The swimming bird was shot without the Extender @ 400 mm while the standing bird was shot with the Extender @ 560 mm (both using the same body and lens).

    If you are into bird photography, and you already own a crisp and sharp lens, this Extender would be a nice addition to your kit - definitely a must-buy. But before you buy, check if your camera body can auto-focus at f/8 (most recent bodies can), else you will loose the AF capability.
    Images in this review
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    10 people found this helpful
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