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Lens review

Sigma 18-125 mm f/3.8-5.6 DC OS HSM

4 September 2009
Szymon Starczewski

10. Autofocus


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We were very curious how the lens will perform in this category, because the producer decided to use an ultrasonic HSM motor here. How did it influence the focusing mechanism? It looks like very well. With our editorial Nikon D200 the lens worked very silently and quite fast. It needed just over 0.5 second to go through the entire scale. What’s more, in studio conditions, in good light, the lens doesn’t miss, because it had 96% accuracy. When the light is worse, so is the situation – but this is rather normal for this appliance class.

We didn’t have any problems with front- or back-focusing either.


Sigma 18-125 mm f/3.8-5.6 DC OS HSM - Autofocus