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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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I have R6 and Canon Mount Adapter EF-EOS R, can I ...
I have R6 and Canon Mount Adapter EF-EOS R, can I use the expender with 400mm L f5.6? How will be the autofocus performance?
Yes, the Canon Extender EF 1.4X III can be used with a Canon R6 via the Canon Mount Adapter EF-EOS R and the EF 400mm f/5.6L lens. Autofocus performance will remain reliable, though it may be slightly slower in low-light conditions due to the reduced maximum aperture of f/8.
Date published: 2025-11-10
I am using a canon are six mirror, less body with ...
I am using a canon are six mirror, less body with a sigma 150 to 600 mm contemporary lens. Will this work with that combination?
The Canon Extender EF 1.4X III is incompatible with the Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary Lens for Canon EF. Instead, use the Sigma TC-1401 1.4x Teleconverter for Canon EF. This teleconverter is compatible with Canon R series mirrorless cameras when using the Canon Mount Adapter EF-EOS R. Here is the link: https://bhpho.to/43dSTYD.
Date published: 2023-05-19
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?
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
Date published: 2020-03-18
Will a version II teleconverter work on Version ...
Will a version II teleconverter work on Version III lenses?
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.
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?
Yes, the auto focus will work on the 70D with that combination lens and teleconverter.
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?
Yes. The EF 100-400, Extender EF 1.4X III, and the Canon 90D will all play incredibly well together!
Date published: 2023-12-11
question
Will the Canon 1.4 Extender III work with the 100-400 v2 and 6D camera?
Yes, I have used that combination, you minimum F-stop will be 1.4 x 4.5 = 6.3
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?
It will mount , you will loos auto focus
Date published: 2021-01-12