Canon EF 14 mm f/2.8L USM II
10. Autofocus
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The tested lens is equipped in an ultrasonic USM autofocus motor. The work of the mechanisms is noiseless and very quick. Running through the whole scale takes just 0.3-0.4 of a second which is a very good result. We must add, though, that the autofocus in this lens is simply unnecessary for many usages. A short focal length gives you significant depth of field so on full frame, even at the maximum relative aperture, setting the scale at 2.4 meters guarantees us a sharp image from less than 1.2 metres to infinity. By f/5.6 the autofocus seems completely redundant. It’s enough you set the distance scale at 1.2 meters and you can get sharp image from less than 60 cm to infinity.
What’s interesting, despite huge depth of field, when you set the standards as high as possible so taking photos at the maximum relative aperture and from a close distance, even such short focal length lens can have a distinct front focus tendency. It can be clearly seen in the case of the EOS 1Ds MkIII. What’s even more interesting, we didn’t see that tendency on the EOS 50D – the focus was set correctly there.
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