LensTip.com

Lens review

Samsung NX 20-50 mm f/3.5-5.6 ED

26 January 2011
Arkadiusz Olech

10. Autofocus



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In this category the tested Samsung at first surprised us in a very unpleasant manner. Theoretically the contrast detection method is so precise that we shouldn’t have any problems with the correct focusing. The accuracy tests of the Samsung NX10 and the NX 30 mm f/2.0 pancake confirmed it as well. Unfortunately the number of misses of the tested Samsung NX 20–50 f/3.5–5.6 left us puzzled. The lens had a constant tendency to front focus. The interesting thing was that we dealt here with the whole series of errors. Sometimes the camera focused perfectly well for a stretch of time only to show front focus in the next series of photos. It turned out the reason of such a performance was prosaic – the NX10 was not totally compatible with the new series of lenses. Perhaps it could be remedied by updating the software of the camera. On the newest Samsung NX100 the focusing became flawless.

The work of autofocus is silent and running the whole scale takes about one second.

Samsung NX 20-50 mm f/3.5-5.6 ED - Autofocus