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Canon Extender EF 1.4X III

BH #CA14XEF3 • MFR #4409B002
Canon Extender EF 1.4X III
Key Features
  • EF Mount Teleconverter
  • 1.4x Magnification Factor
  • Microcomputer Controlled
  • Communication Between Lens & Camera
The Extender EF 1.4X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 1.4x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses.
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Canon Extender EF 1.4x III Overview

The Extender EF 1.4X III from Canon is designed for select Canon EF mount L-series telephoto lenses. It increases the focal length of a lens by a factor of 1.4x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses.

The Extender EF 1.4X III features seven optical elements in three groups and all optical elements have Canon's Super Spectra coating to reduce ghosting and flare. A new Fluorine Coating on the front and rear elements makes marks, such as spots left by water or fingerprints, much easier to clean than standard coatings.

To facilitate the accurate transfer of imaging data between the lens and camera body, the extender features an integrated processor which ensures all focusing, metering and ID information is available - allowing the photographer to capture balanced, well-exposed images. When combined with the latest range of premium Canon L-series lenses, these extenders enable AF accuracy even when capturing moving subjects. When attached, the 1.4x extender reduces the effective maximum aperture by 1 stop.

A carefully positioned lens release mechanism also makes it easy to mount the extenders quickly, reducing the time that the camera and lens are exposed to the environment. The extenders offer the exceptional build-quality expected from Canon's professional products, and are resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.

Note: This converter 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. Additionally, please see the lens and/or camera body manual for full autofocus compatibility information with the Extender EF 1.4X III.

Carefully positioned lens release mechanism makes it easy to mount the extender quickly, reducing the time the camera and lens are exposed to the environment.
Integrated processor communicates between camera and lens and ensures all focusing, metering and ID information is available.
All optical elements use Canon's Super Spectra coating, reducing ghosting and flare.
Fluorine Coating on the front and rear elements keeps soiling, smears, and fingerprints to a minimum.
Sealed to be resistant to both dust and water, allowing photographers to use them in extreme shooting conditions.
UPC: 013803122145

Canon Extender EF 1.4x III Specs

MountCanon EF
Magnification1.4x
Optical Design7 Elements in 3 Groups
Light Loss1 Stop
Length1.1" / 27.2 mm
Diameter2.8" / 72 mm
Weight7.9 oz / 225 g
Packaging Info
Package Weight0.765 lb
Box Dimensions (LxWxH)4.65 x 3.8 x 3.65"

Canon Extender EF 1.4x III Reviews

Great Accessory

By Laura
Rated 5 out of 5
Date: 2022-06-29

Works perfectly with my 100 - 500 and 70 - 200 lenses. Love that autofocus works with this attached.

LOVE this Extender EF 1.4x III

By lovethebeach1212
Rated 5 out of 5
Date: 2022-05-15

LOVE this Extender EF 1.4x III - The photos have been amazing!

Works fine on R5 with EF/RF adapter

By John
Rated 5 out of 5
Date: 2022-04-27

Used with an R5 and EF 100-400L lens and Canon EF/RF adapter. Picture quality is good and electronic connections work as expected. Focus is a tad slower with occasional hunting, but nothing significant. Nice way to get a bit more reach without spendng big bucks on a RF100-500L lens.

1.4X extender delivers

By Ramon
Rated 5 out of 5
Date: 2022-04-27

I have a Canon EF 400mm f/5.6. The Canon EF 1.4x Mrk III works flawlessly, AF speed is not affected, image quality is superb. There is no discernible performance difference when using it with my 5D Mrk III or 5D Mrk IV.

Excellent Optics - However, most misunderstand how to use an extender!

By Pavlikspictures
Rated 5 out of 5
Date: 2022-03-25

The Extender EF 1.4x, the 3rd generation has excellent optics and produces impressive images (So does its 2x sibling). The purpose for using this extender to enlarge the subject matter in the image frame. Not to reach long distances. Atmospheric interference means any haziness, or heat haze will only be magnified. This extender was designed for L lenses. It works superbly with the prime lenses. I have used it with the 300mm f/2.8 ver II, 500mm f/2.8 ver II as well as the 600mm f/4 ver II. In addition, I have used this extender with the EF 100-400mm ver II. The images this combo produces is amazing considering it is not a prime lens. If your goal is to extend your reach so you can take pictures of distant subjects and expect a clear and sharp image, you will be disappointed. Even a prime lens with the extended reach will have difficulty producing a clear image due to atmospheric conditions. However, if you are taking pictures of subjects such as birds, or aircraft that fit 1/2 of the frame and wish to have images that fill 3/4 or more of a frame at distances that are not effected by atmospheric conditions, then you will amazed by the results this combination provides. Note: on a zoom lens such as the 100-400mm ver II, your f stop will become f/8 and therefore you will only be able to use a small portion of the autofocus points and in lower models perhaps manual focus will be your only choice. This is where a mirrorless camera is the perfect solution as it will allow for use of all autofocus points. Also, because of the additional reach, you will need to increase your shutter speed and expect slower autofocus acquisition in low light. This is an excellent addition to ones photography tools, but needs to be used in appropriate conditions.

Excellent Tele-extender for Canon camera & lens products!

By William
Rated 5 out of 5
Date: 2022-01-17

Connect Canon telephoto lenses and Canon DSL cameras with this tele-extender. The auto focus feature and the stabilizer feature continue to work when using this tele-extender. You lose one f-stop but it is a small price to pay for 40% more in focal length. This is my third Canon 1.4X.

Works as described. Sharp

By Greg
Rated 5 out of 5
Date: 2022-05-17

Works well on my 70-200 L 3 also 400m 5.6 L. Only auto focuses on the 70-200 L 3

Works great with Canon EF 100-400mm on EOS R

By Keith
Rated 5 out of 5
Date: 2022-05-16

Sharp. Fast, accurate autofocus with Canon EF 100-400mm, EF-EOS R control ring adapter, and EOS R. Reports correct focal length in meta data.

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will this fit a will this extender work with a ...

will this fit a will this extender work with a Tamron SP 150-600mm f/5-6.3 Di VC USD G2?
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I'm sorry, no, Canon converters only work with Canon L series pro lenses, like the 70-200 and 100-400. Tamron makes a converter that would work. You can click on the link below to view: https://bhpho.to/3db5gf2
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Will a version II teleconverter work on Version ...

Will a version II teleconverter work on Version III lenses?
Asked by: James
Yes, they will. The version II teleconverter will have the same function in the version III lenses as it has on the version II lenses.
Answered by: Michele
Date published: 2020-03-17

question

This is obviously 100% compatible with the Canon 70-200 f2.8L IS II but does the autofocus work perfectly when attached to a 70D and this lens?
Asked by: Anonymous
Yes, the auto focus will work on the 70D with that combination lens and teleconverter.
Answered by: Robert K.
Date published: 2018-08-28

Will Canon Extender EF 1.4X III work with EF ...

Will Canon Extender EF 1.4X III work with EF 100-400mm f/4.5-5.6L IS II USM on an EOS 90D?
Asked by: Mark
Yes. The EF 100-400, Extender EF 1.4X III, and the Canon 90D will all play incredibly well together!
Answered by: Jeremy
Date published: 2021-09-30

question

Will the Canon 1.4 Extender III work with the 100-400 v2 and 6D camera?
Asked by: Kenneth B.
Yes, I have used that combination, you minimum F-stop will be 1.4 x 4.5 = 6.3
Answered by: Frank W.
Date published: 2018-08-28

Will this work with Canon 100-400 II and a 5D ...

Will this work with Canon 100-400 II and a 5D Mark III?
Asked by: Edward
It will mount , you will loos auto focus
Answered by: vilson
Date published: 2021-01-12

will this work on Canon R 7 with ef-r adapter ...

will this work on Canon R 7 with ef-r adapter with ef lenses?
Asked by: Greg
If you use a Canon teleconverter on a Canon lens with a Canon camera, it should work. However, it works according to the"rules of teeconverters" which means that most cameras will not autofous if the aperture goes above an F8. When you use a 1.4 extender, you lose 1 stop on the lens. If the higher aperture was a 5.6, 1 stop would take it to an f8 and you'd still be ok. But if the lens was already an f8 or slower, you'd lose autofocus. The other thing to worry about is that not all lenses will physically fit on a teleconverter. That protruding section (I like to call it a nose) might impact the back of the lens which is not a good thing. So, you have to check if the particular EF lens is compatable with the teleconverter. If it is, the EOS R adapter will let you mount it on the camera.
Answered by: Hymie
Date published: 2022-06-22

question

Will this work with my 70-200 f2.8L IS II?
Asked by: Anonymous
The Canon Extender EF 1.4X III is compatible with the Canon EF 70-200 f2.8L IS II.
Answered by: Christina S.
Date published: 2021-08-18
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