Canon Extender EF 2X III

Model #4410B002

USA Version
Canon 4410b002 1
Canon 4410b002 1
Canon 4410b002 2
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General Information

Magnification 2.0x
Lens Elements/Groups 9/5
Light Loss 2 Stops
Length 2.1" (52.7mm)
Diameter 2.8" (72.0mm)
Weight 11.46 oz (325g)
Expert Reviews
The digital picture.32823291
26 February 2014

As represented above, Canon offers a huge range of prime (fixed focal length) lenses. Options range from ultra-wide angle through super telephoto and from tilt-shift through macro. There is a lens for practically every need included here.

Photo net.32822890
17 November 2010

by Jeff Medkeff

User Reviews
B h photo.32817553
4 August 2015

Have used third party extenders and they were good but this one is awesome! I'm using it on a 70-200 f4 IS USM attached to a 7D Mark II and it works flawlessly. Auto focus is quick and I can hand hold it with no problem and I am an elderly gentleman. Highly recommend.

  • +

    Durable, Easily Interchangeable, Fast / accurate auto-focus, Rugged, Strong Construction

4 October 2015

This is a superb extender which works flawlessly with the Canon prime telephoto and super telephoto lenses. I bought it to supplement my Canon 300 mm f/2.8 IS II lens to give me an effective 600 mm f/5.6.

  • +

    Very cost effective way of increasing your telephoto reach. It's very light and compact.

  • -

    Loss of two stops of light compared with the mated lens.

29 July 2014

This is the second Canon 2x extender I've had. I use this with a full frame Canon 5D Mark III and find it remarkable for getting closeups of people in day-to-day activities, sports, and closeups of flowers and of wildlife (e.g., elk and bison in Yellowstone National Park).

  • +

    Consistent Output, Durable, Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction

  • -


9 August 2015

Outstanding images with this in conjunction with my 300mmF2.8L. Frustrating that it does not work with the 100-400 F4.5L ll USM, while it did work with the original version of this lens, (although this was not consistent). I also own the 1.4x extender.

Slrgear com.32823196
22 October 2011

Tested this like 5 weeks ago. The Extender 2x III performs better on my 70-200L IS Mk2 than on the Mk1. There is a noticable difference in AF and IQ. I had them side by side. The Extender 2x III gave no improvement on the 70-200L IS Mk1 over the Extender 2x II. I got the Extender 2x III in the end.

  • +

    Good build, good image quality, still fast AF

  • -


Product Highlights
  • EF Mount Teleconverter
  • 2.0x Magnification Factor
  • Microcomputer Controlled
  • Communication Between Lens & Camera
  • Spectra Coating Reduces Ghosting/ Flare
  • Protective Fluorine Coating
  • Dust and Water Resistant
  • Compatible with Select EF Mount Lenses
In The Box
  • Canon Extender EF 2X III
  • Extender Cap E II
  • Lens Dust Cap E (Rear)
  • Lens Case LP811
  • Limited 1-Year Warranty
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