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
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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 4409B002 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 4409B002 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"
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Is the Canon 1.4x III extender compatible with ...

Is the Canon 1.4x III extender compatible with the EOS 70D and 80D bodies? I have the 100-400 L series lens but have seen people have issues with the camera body and auto-focus.
Asked by: Warwick
I'm afraid I can't answer as I don't own those bodies. It works flawlessly with the 5D mk IV and the 600 f/4 II, but that's all I use it with.
Answered by: Geoffrey
Date published: 2021-06-18

will autofocus work with 1.4xiii extender and EF ...

will autofocus work with 1.4xiii extender and EF 100-400 4.5-5.6 L IS lens and 5d Mark IV body? If so, how is focus only via central point? How is image quality?
Asked by: Nancy
The 1.4 will autofocus wwith the 5D Mark IV, I use this combination as my primary lens. The pictures are sharp and it gives me the range I need wwithout the $$$.
Answered by: Marie
Date published: 2021-06-14

Does auto focus work with the canon extender ...

Does auto focus work with the canon extender 1.4xIII and combination of canon 100-400/4.5-5.6 L IS lens on a canon 5d mark iv body? If so, what is image quality?
Asked by: Nancy
Yes, it will work with the 100-400 L IS (both original and II). From our testing, the AF speed on the original version of the lens will suffer a tad bit at longer focal lengths but still works adequately. Image quality, as with all teleconverters, will take a tiny hit due to the addition of optical elements between the camera and lens. However, many agree that it is a very small sacrifice for the increased focal length.
Answered by: Jeremy
Date published: 2021-06-14

Will autofocus work with a Canon EF 100-400 ...

Will autofocus work with a Canon EF 100-400 4.5-5.6 IS USM on a GH5 camera using a Viltrox EF to M43 adapter?
Asked by: Ian
I don't know about that camera. I use a Canon 5D, so can't give you info about Panasonic syncing. Works great with my Canon.
Answered by: Wendy
Date published: 2021-05-31

Any experience with this and Sony FF cameras? I ...

Any experience with this and Sony FF cameras? I have the 135L and the 70-200/4 IS II. Thanks
Asked by: David
I use this extender on my Canon 100-400mm all the time. It works fantastic. Can't help you with the Sony camera. But a friend of mine has a Sony camera and he has a 100-400mm lens with a 1.4 extender, he loves it! We basically have the same set up. Much lighter weight than the big 600mm lenses, and easier to hold and catch birds in flight! It really depends on what you are trying to shoot. For up close sporting events, the 70-200mm lens is fantastic. For long distance bird photography, not so good. You end up cropping the images a lot and get blurry results!
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Date published: 2021-05-10

How well will this work with 7D mark 2 and older ...

How well will this work with 7D mark 2 and older version 100-400?
Asked by: Donna
I have used it with numerous Canon cameras, the 70-200, and the 100-400, and it worked flawlessly. You do lose a few stops of light so depending on your situation you might need a tripod fir slower SS.
Answered by: Kathy
Date published: 2021-05-02

Is there any teleconverter that works with the EF ...

Is there any teleconverter that works with the EF S18-135 lens?
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Date published: 2021-04-28

Will the 1.4x lll work with canon 70-200 1.4 L IS ...

Will the 1.4x lll work with canon 70-200 1.4 L IS USM ?
Asked by: Cameron
Yes. this works with the Canon EF 70-200mm f/4L IS.
Answered by: Yaakov
Date published: 2021-04-08
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