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White Canon EF 2.0x teleconverter barrel, compact cylinder with weather-sealed mount

Canon

Canon Extender EF 2X III 4410B002 2.0x teleconverter camera lens

SKU CH-YDZJ-E0XRC MPN 4410B002

Doubles the focal length of compatible Canon EF L-series lenses with 2.0x magnification, microcomputer communication, and dust-resistant construction

  • Part type or number4410B002
  • Lens mountCanon EF
  • Magnifying power2.0x
  • Optical construction9 elements in 5 groups
  • Product typeConverters & Adapters
  • Product colorWhite
  • Doubles focal length with 2.0x magnification factor
  • Microcomputer enables communication between lens and camera
  • Spectra coating reduces ghosting and flare effectively
  • Fluorine coating repels water, dust and dirt
  • Dust and water resistant construction for durability

Extender EF 2X III for EF Mount

The Canon Extender EF 2X III is a 2.0x teleconverter designed for Canon EF mount cameras. It doubles the focal length of compatible fixed focal length L-series lenses 135mm and over, as well as specific zoom lenses including the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. It is not for photographers using non-L series lenses or focal lengths shorter than 135mm.

Optical Performance and Build Quality

The extender uses 9 elements in 5 groups with Super Spectra coating to reduce ghosting and flare. A fluorine coating on front and rear elements repels water, dust and dirt. Dust and water resistant construction supports use in challenging conditions. A built-in microcomputer maintains communication between camera body, lens and extender for accurate exposure and focus data.

Installation and Compatibility Constraints

The unit attaches between the camera body and a compatible EF lens, adding 2.8 by 2.1 inches and 11.5 oz. Autofocus and metering function only with the listed L-series lenses; other EF lenses will not communicate correctly. Buyers needing compatibility with EF-S mount lenses, third-party glass, or focal lengths below 135mm cannot use this extender.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $312.99
Cheaper than about 75% of the 2,570 comparable items (median $546.49).

Specifications

Product
Brand nameCanon
Model nameExtender EF 2x III
Part type or number4410B002
Product typeConverters & Adapters
Product colorWhite
Audio & video
Lens mountCanon EF
Optical construction9 elements in 5 groups
Size & build
Product dimensions2.8 × 2.1 in
Product weight11.5 oz
Shipping weight1.93 kg
Package size137 × 95 × 95 mm
Compatibility
Compatible withThis lens is only compatible with fixed focal length L-series lenses 135 mm 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.
More details
Magnifying power2.0x

Questions about this item

Does the Extender EF 2X III generate heat or draw extra power during all-day shooting?

The extender is a passive optical device with no electronics that consume power or produce noticeable heat during extended use.

Which specific lenses must I already own for this extender to function?

It works only with fixed focal length L-series lenses 135mm and longer, plus the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L and EF 100-400/4.5-5.6L.

Will autofocus and aperture control remain reliable when I pair this 2.0x extender with my older EF 70-200mm f/2.8L?

The built-in microcomputer maintains full communication between that lens and the camera body, preserving autofocus and aperture operation.

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