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Canon is an industry leader in professional and consumer imaging equipment and information systems. Canon's extensive product line enables businesses and consumers worldwide to capture, store and distribute visual information. Cannon provides a wide range of accessories that are fully tested and 100% compliant with the corresponding equipment. All accessories are noted for their high reliability and superior quality.The Company offers its new EF 1.4x II extender that is designed for use with all Canon EOS System cameras and most high-end EF telephoto and super-telephoto lenses including all fixed-focal length L-series lenses from 135mm to 1200mm as well as several L-series EF telephoto zoom lenses. Its new internal anti-reflection construction improves contrast even when shooting in heavy backlit conditions. The EF 1.4x II extender will give photographers the additional telephoto capabilities they need without sacrificing image quality. In addition, the compact design of the extender will allow photographers to travel with a lighter, more compact gadget bag.
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Technical Details
- 1.4x telephoto extender for multiplying focal length of Canon 135mm or longer lenses- Fits all 135mm or longer fixed focal length lenses and some 70-200mm telephoto lenses
- Preserves autofocus on any EOS camera when combined with f/4 or faster lens
- Weather-resistant construction and improved anti-reflective surfaces in the barrel
- Measures 2.9 inches in diameter and 1.1 inches long; weighs 7.8 ounces
See more technical details
By PJ (GTA, Canada)
Like:
- Smaller than the Canon EF 15mm f/2.8 Fisheye USM.
- Solid build.
- Dust and water resistant.
- Drawstring pouch.
- Minor resolution loss on my 70-200/4L IS and 300/2.8L IS (nothing to worry about).
- Maintains autofocus with lenses f/4.0 and faster (this is important to remember).
- Maintains optical image stabilization.
Dislike:
- Extender Cap II (front cap) cannot be used as a camera body cap.
By EASYJOHN (VIRGINIA, USA)
CANON DOES NOT STATE CLEARLY THAT THE EXTENDER WILL NOT WORK IN AUTO FOCUS MODE WITH THE CANON 100-400 F/4.5-5.6L IS USM LENS. I BOUGHT THIS EXTENDER UNDER THE IMPRESSION THAT IT WOULD WORK.See canon information (This tele extender can be used with fixed focal length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens), and the EF 70-200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, 70-200 f/4.0L IS USM, and 100-400 f/4.5-5.6L IS zoom lenses) AS I READ THIS INFORMATION I UNDERSTOOD IT TO MEAN IT WOULD WORK WITH THIS LENS. AM I WRONG?
I TRIED 2 EXTENDERS AND THEY WOULD NOT WORK. EMAILED CANON, HERE IS THEIR RESPONSE
From: Canon Support - 2
Sent: Sat, 19 Dec 2009 14:14:05 +0000 (UTC)
Subject: Re: Response from Canon - Technical Support
(KMM10520549V32035L0KM)
Thank you for writing to us. We value you as a Canon customer and
appreciate the opportunity to assist you.
"Effective aperture is reduced by one f-stop; autofocus is possible on
any EOS camera when combined with a lens having an f/4 or faster maximum
aperture."
Your EF 100-400 is already at F4.5, at its widest.
"This tele extender can be used with fixed focal length lenses 135mm and
longer (except the 135mm f/2.8 Softfocus lens), and the EF 70-200
f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, 70-200 f/4.0L IS USM, and
100-400 f/4.5-5.6L IS zoom lenses."
This statement is also true, it can be used. However, you will need to
focus manually.You may want to try choosing center point only as a focus
point and see if that will allow the camera to autofocus the lens.
We hope this information is helpful to you. Please let us know if we
can be of any further assistance with your EF 100-400mm f/4.5-5.6L IS
USM .
Thank you for choosing Canon.
Sincerely,
Jeff
THIS STATES THAT AUTO FOCUS WILL NOT WORK!!!!!
By J. Gwinn (West Virginia USA)
Fortunately my intentions are to use mainly with my canon 300mm f4..I give 5 stars in this regard.The drop off in sharpness is apparent when shooting photos of birds. The plummage/feather detail expose the sharpness drop off slightly. But with regard to sports where eyelash/hair splitting detail is unimportant,I see virtually no difference. Of course you lose one stop of light which is no issue in most daylight situations.
The mount on my Sigma 70-200mm is not compatible with the telextender. The problem is I can't tell you which version. I purchased my sigma lens in 2006..For that year one version was marketed in Feb 2006 another in June 2006..I am assuming this is the problem?? Also I see where another verion was marketed in 2008..I see more than a few reviewers which do not have compatibility problems. But for me i'll give it "0" stars regarding my sigma lens.
Nice addition to my bag of lens. Very compact when you consider it is almost like carrying two telephoto lens instead of one. I gave this product a two star to flag potential buyers of compatibility problems with the Sigma.
By Michael A. Duvernois (Minneapolis, MN United States)
Don't do it! It sounds just plausible on paper, with a 1D professional camera it'll even autofocus using the central focal sensor (on lesser bodies it won't autofocus unless you tape up some contacts to fool the camera into trying, then it'll sometimes autofocus), and the 1.4x generally doesn't soften images too much. But no. It's not a usable combination on either professional or amateur bodies, the image quality just takes too much of a hit.
The four stars are for using this well built tool with a more appropriate lens, the 70-200mm f/2.8 or any of the telephoto primes. But there are lots of reviews telling you that.
By Paul S. Embley (Williamsburg, VA)
I'm using this with a 70-200 2.8L IS USM lens and it works great. Fast focusing, great alternative to another lens. The only downside is the loss of an f-stop.
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