Sigma 70-200 mm f/2.8 II EX APO DG Macro HSM
10. Autofocus
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Sigma 70-200 mm f/2.8 II is equipped with an ultrasonic HSM motor. And we have to admit that it’s one of the best HSMs we’ve ever came across. You can easily say that its work is fast and silent. There are no major reservations concerning accuracy, either, as in studio conditions it missed in less than 6% cases, and most of them were at 200 mm focal length. What’s interesting, the number of misses and the efficiency of work doesn’t decrease noticeable after mounting the converter.
We didn’t observe any distinct tendency of front- or back-focusing, either.
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