Canon EF-S 18-55 mm f/3.5-5.6 IS II
10. Autofocus
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When it comes to the speed and the noise level of the focusing mechanisms, the results are similar to those of the predecessor. The autofocus buzzes quietly and is quite fast for such a cheap lens. Running through the whole scale, no matter from which end, takes about 0.7 of a second. The accuracy result surprised us a lot, though. The predecessor, tested on the EOS 20D missed in only 3% of all shots. Attaching the new model to the EOS 50D, on which you have a better autofocus system than on the 20D after all, we certainly didn’t expect any worsening of results. The performance was significantly worse, though, as the number of misses increased to 11%.
Apart from that the lens had a slight back focus tendency. It was so insignificant, though, that you could correct it easily using a microregulation option, available from the menu of the 50D.
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