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How sharp should the 16-25mm L II be on a 6D body?

Started May 26, 2013 | Discussions thread
Marco Nero
Marco Nero Veteran Member • Posts: 7,582
Re: How sharp should the 16-25mm L II be on a 6D body?

Both shots were tripod mounted, taken within moments of each other, and were both shot at f11.

Thanks in advance your for your consideration and comments.

I'm assuming you meant 16-35, not 16-25?

The Sigma image is clearly softer when viewed at 100%.  The Canon lens produced a noticably sharper image with bolder definition in the details.  But you shot these both at f/11 which means you are assessing the lenses at (probably) their sharpest.

Whist that's fine as a test, many lenses perform horribly at their widest and often the Canon lenses are far less prone to Chromatic Aberration and Purple Fringing than other brands. Perhaps you should try them at f/2.8?  Obviously, the Canon has a very good reputation with their 16-35L lens and many photographers from Reuters consider this to be the most commonly chosen lens for photojournalism ... hence I would choose it over the Sigma any day.

I've owned the EF 16-35mm f/2.8L II for about two years and it's only recently that I've come to appreciate just how sharp and reliable the optical array is on this lens.  On the 6D is should be superb.

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Regards,
Marco Nero.
www.pbase.com/nero_design

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