Canon has announced an upgrade on two of its popular extenders with the new Canon Extender EF 1.4x III and Extender EF 2x III.
These direct replacements feature faster autofocusing, improved autofocus precision with compatible EF lenses, an anomalous dispersion lens element for reduced chromatic aberration, enhanced optical image quality, a newly developed microcomputer that increases AF precision when the extenders are used with a IS Series II EF super-telephoto lens, rubber gaskets and seals to enhance weather resistance, and a new fluorine anti-smear coating on the front and rear elements that is highly oil and water-repellent. The Canon extenders give photographers additional telephoto reach with amazing clarity.
The new Canon Extender EF 1.4x III and Canon Extender EF 2x III will be available in December for $500 each.
Canon Extender EF 1.4x III and Extender EF 2x III Press Release
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Good morning,
I would like to kindly asked for the following – Cannon has published Canon Extenders of new gen 1,4x III and 2x III. Unfortunately, I did not found info about possibillity to use functions of lens mainly AF mode and IS concretely for
Canon EF 500mm f/4.0 L IS USM
Canon EF 100-400mm f/4.5-5.6 L IS USM
to be used with Canon 5D Mark II camera. Can you help me with these questions ? Normally, they are answered in brochures belong to lens or extenders. Many thanks in advance. Jiri Pavel
Hello Jiri, I am not an expert, but AF only works with extenders if the aperture of the lens is 2.8 or faster.
Hi Jiri,
The 5D Mk II – like all non-1D bodies – can only autofocus at f/5.6 and wider. (The 1D series can use the centre AF sensor at f/8.) The 1.4x results in a loss of one f-stop; the 2x loses two f-stops.
So, you could use your 500mm f/4 lens with the 1.4x, giving you 700mm f/5.6 – with AF. Otherwise, AF won’t work.*
* There are some reports that the 1.4x II extender works with the 100-400mm; if you had nothing else in the field, it might be worth a try – but I wouldn’t put money on it.
It works only on a 1D or 1Ds body. With any camera that focuses at only f5.6, it won’t work. I have a 1Ds Mk III and it works fine, but it doesn’t work at all on my 5D or my 40D.
I have heard that Canon 1.4x EF Extender is better than the 2.0 extender; is that correct?, If so, why. I have a 7D and want to get the 100mm-400mm lens for wildlife shots and want to make sure I get the right equipment.