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Canon Extender EF 2x III
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Product Description

Canon Extender EF 2x III Enhanced environmental protection, redesigned optics and improved data communication between lens and camera. The Extender EF 2X 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 2x while... read more

Canon Extender EF 2x III

Enhanced environmental protection, redesigned optics and improved data communication between lens and camera.

The Extender EF 2X 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 2x 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 2x III features nine optical elements in five groups, ensuring improved optical performance. 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 2x extender reduces the effective maximum aperture by 2 stops.

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.

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.
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MPN: 4410B005

Barcode: 4960999664835

Canon Extender EF 2x III Specification

  • Mount Canon: EF
  • EF Mount Teleconverter
  • 2.0x Magnification Factor
  • Microcomputer Controlled
  • Communication Between Lens & Camera

Optical Design

  • 9 Elements in 5 Groups
  • Light Loss 2 Stop

Physical

  • Length: 52.7 mm
  • Diameter: 72 mm
  • Weight: 325.0 g

MPN: 4410B005

Barcode: 4960999664835

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Customer Reviews

By keith on 15th March 2023
"For mirror canon camera just ideal for my 100-400mm canon telephoto lens. works well with the EOS 90D. Will work with the 70-300mm canon telephoto lens, but it has to be at max 300mm as the extender stand off nose will fit but you cannot zoom back in. But it does give a bit of flexibility if required when using the 70-300 lens. "
Star Rating 5
By Richard on 15th September 2020
"Item received well packed and on time, I would use Castle Cameras again."
Star Rating 5
By TerenceWareham on 10th August 2019
"A great improvement on my previous extender, as has not lost the auto focus facilities, unlike the previous extender, so becomes a pleasure to use."
Star Rating 5

Canon Extender EF 2x III

£449.00
WAS £459.00
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Two Year Canon UK warranty

+ ACCESSORIES
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Product Summary

Enhanced environmental protection, redesigned optics and improved data communication between lens and camera.

 

Upgrading? Check our offer for your old gear

 

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