
Review Summary
2011-04-02T21:00:00
Worked great for photographing cars at a distance on a race course.
JOHN M.
2011-03-27T21:00:00
Excellent addition to 500mm F4 IS for those times when closer approach is not posssible.
WAYNE K.
2011-03-26T21:00:00
I use this extender mostly with the 70-200mm F4 non IS lens. I really like how it extends the lens to 280mm which is very helpful. It does reduce the aperture by a stop but that's not a big deal for receiving an extra 80mm worth of zoom. The best thing about it is that it does not effect the quality or focusing of my lens. All the pictures come out tack sharp!
Chris
4 groups /5 elements
1.4x
2.9" x 1.1" / 72.8 x 27.2mm
7.8 oz./ 220g





Very helpful!
By Chris
I use this extender mostly with the 70-200mm F4 non IS lens. I really like how it extends the lens to 280mm which is very helpful. It does reduce the aperture by a stop but that's not a big deal for receiving an extra 80mm worth of zoom. The best thing about it is that it does not effect the quality or focusing of my lens. All the pictures come out tack sharp!
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, and 100-400 f/4.5-5.6L IS zoom lenses.
Superb optically, it preserves the image quality of the lens it's mounted to and multiplies its focal length 1.4x.
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.
The new version II maintains the outstanding optics of the previous version, and adds enhanced weather- resistant construction, and improved anti-reflective surfaces in the barrel.
(When used with EF Extender EF 1.4x II, the EF100-400mm f/4.5-5.6L IS USM lens is compatible for auto exposure with all EOS cameras.
However, you lose autofocus with all EOS cameras except those with a 45-point AF system, such as EOS-3, EOS-1v, EOS-1D, EOS-1Ds and EOS-1D Mark II. Only the center focusing point is functional when this lens/extender combination is used with the 45-point AF cameras.
Also, when the EF100-400L is used with the EF 1.4x II, the Image Stabilizer function does not work with older EOS 35mm cameras such as the EOS 650, 620, 630/600, RT, 700, 750, 850, EOS-1, A2/A2E, 10s, Elan, Rebel/Rebel S, and Rebel II/Rebel SII.)
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