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Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses

4.4 out of 5 stars 113 customer reviews
| 79 answered questions

Price: $429.00 & FREE Shipping. Details
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  • Focal Length & Maximum Aperture Magnification: 1.4x
  • Lens Construction of 7 elements in 3 groups
  • Max. Diameter x Length - 2.8" x 1.1" (72.0mm x 27.2mm)
  • Weight - 7.9 oz (225g)
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  • Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses
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This item: Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses
Customer Rating 4 out of 5 stars (113) 5 out of 5 stars (133) 4 out of 5 stars (75) 5 out of 5 stars (145)
Price $429.00 $1,999.00 $149.88 $1,179.00
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com ThePixelConnection UTM Inc Amazon.com
Compatible Mountings Canon EF Canon EF Canon EOS Canon EF
Dimensions 2.83 inches x 1.06 inches x 2.83 inches 3.7 inches x 7.6 inches x 3.7 inches 0.39 inches x 0.39 inches x 0.39 inches 3.54 inches x 10.12 inches x 3.54 inches
Item Weight 0.49 pounds 3.46 pounds 0.01 pounds 2.8 pounds
Lens 35mm Zoom lens Teleconverter Prime lens
Maximum Aperture 1.4 40 4.5 5.6
Max Focal Length 1 400 mm 280 mm 400 mm
Min Aperture 10 4.5 Information not provided 32
Min Focal Length 1 100 mm 15 centimeters 400 mm
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Product Description

Product Description

The Canon Extender EF 1.4x III extends a lenses focal length by a factor of 1.4x. Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender; features careful lens placement and coatings to minimize ghosting and flare and even has a new Fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction

From the Manufacturer

Extending a lens's focal length by a factor of 1.4x, the Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender; features careful lens placement and coatings to minimize ghosting and flare and even has a new Fluorine coating that keeps soiling, smears and fingerprints to a minimum. An integral part of many professional systems, Extender EF 1.4X III maintains high standards not only optically, but also in terms of rugged, dustproof and water resistant construction.

Technical Specifications
  • Focal Length & Maximum Aperture Magnification: 1.4x
  • Lens Construction 7 elements in 3 groups
  • Max. Diameter x Length, Wight 2.8 x 1.1 in, 7.9 oz / 72.0 x 27.2mm, 225g

Product Information

Product Dimensions 1.1 x 2.8 x 2.8 inches
Item Weight 7.8 ounces
Shipping Weight 12.8 ounces (View shipping rates and policies)
ASIN B0040X4PUE
Item model number 4409B002
Customer Reviews
4.4 out of 5 stars 113 customer reviews

4.4 out of 5 stars
Best Sellers Rank #282 in Camera & Photo > Lenses > Camera Lenses > Digital Camera Lenses
Date first available at Amazon.com August 26, 2010

Technical Specification

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Customer Reviews

Top Customer Reviews

Verified Purchase
I currently use this on my Canon 70-200 f4 L IS with an EOS 7D. I chose the 70-200 f4 IS over the f2.8 primarily because of IS and the weight. With the teleconverter at f5.6 I can still get good pictures and the IS helps quite a bit.

When used with a 70-200 f4L IS, it gives me an equivalent: 98-280mm and f5.6 - f45 aperture.
When used with the 70-200 F4L IS and an EOS 7D you get approximately: 157-448mm and same aperture.

I'll try to post some picture examples above for the product description because "they" won't let us put links here. :-(

PROS: Extends the length of professional quality Canon L Lenses with little or no noticable degredation in image quality.

COS: Only works with certain Canon and 3rd party lenses. Some of the 3rd party teleconverters such as Sigma and Tamron will work with other lenses that this TC will not because of the protruding element but I just can't beleive they are as good of quality. If you are ONLY using this with the compatible Canon lenses, then get this one definitely.

YOU MUST CHECK THE COMPATABILITY CHART BEFORE PURCHASING THIS SO YOU ARE NOT WASTING YOUR TIME. As of 4/29/13, this is what Canon's website states: Note: This lens is only compatible with fixed focal length L-series lenses 135mm 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.
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Verified Purchase
I upgraded from my 1.4x II to use on my 70-200 f/2.8 II lens and have been impressed with it, minus one optical flaw... At 70mm, it actually shows more CA/fringing than the previous model. However, at 200mm it performs better in that regard with less CA/Fringing. I actually returned the first one Amazon sent to me because I thought it was damaged somehow. The replacement performed exactly the same. I am thinking because these Mark III converters were designed for use with the super-tele's that the optical construction was developed to maximize IQ at those focal lengths. On the wider end, it may not correct these aberrations as well, even though it does offer higher resolution all around (see below).

Sharpness wise, the 1.4x III is better. I compared carefully doing side by side test shots... Tripod, mirror lockup, live-view focus, etc... The 1.4x III always had finer detail and more contrast. It was actually quite noticeable, although not as much in real-world shooting. AF performance is the same (with this lens), but I do like the build quality better. More mounting screws, better switch to release the lens, etc...

I think it was worth the upgrade after seeing the additional resolution it offers. I am very happy with it.
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A starting consideration:
It stands to reason that an extender at a few hundred pounds cannot possibly do anything like the job of a longer lens costing thousands of pounds.
If it did then Canon would soon be out of business!

So exactly what is on offer here and what is not?
A considered and truthful opinion from a professional photographer and his supplier.
Not everyone will be bothered by these professional provisos but everyone should understand the issues before considering purchase as follows:

........................

Firstly the hard facts:

1. This extender loses one stop of light which means that only 1/2 of the normal light from the lens will reach the sensor
2. Only series 1 cameras will only give auto focus at basic f8.0 or wider which means that the slowest lens possible for auto focus will be f5.6
3. Non-series 1 cameras will only give auto focus at basic f5.6 or wider which means that the slowest lens possible for auto focus will be f4.0
4. Both the f4.0 or f5.6 basic apertures with the extender fitted will increasingly be relatively slow to latch on to focus in less than good light

[...] gives in-depth reviews of all lenses and full explanations of the above facts.

...............................................
My professional experience

This extender was bought primarily to extend the use of the 300mm F2.8 and the 70-200mm F.8 lenses. I had previously owned the original version of this extender and then the Mark 2. This Mark 3 continues the improvement although it must be said that differences are slight and you need large images to fully see any real change. All three extenders have real matters of compromise to consider and these apply to this latest model too.
Read more ›
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Verified Purchase
I am very pleased with my new type III lens extender. It is made for a select group of Canon lenses. Before ordering one for your camera body, consult this list! With my 70-200mm f4L lens this extender works very well. I plan to take this lens set up with me to Alaska this summer. It should have the reach that I need. Keep in mind that with this combination, my lens is now f5.6, one stop slower. I still retain IS and fairly rapid AF. I just don't plan to shoot at late dusk with it. Like my zoom lens, this extender is weather sealed at the connections. The additional cost of this extender for my zoom lens gives me the versatility without the greater cost of purchasing a new 400 or 500mm L series lens. My lens set up now has a length of 7 inches and not much extra weight. Matched with my 40D camera body, I can tote this weight around all day.
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