I was very disappointed in this lens , not in the optics but in the mechanics. When OIS was enabled a high pitched tone was emitted from the lens in the 10,000 - 11,000 hz (hertz) range, at about 10 dB(decibels), it was very audible and also could be recorded on the cameras microphones , in this case a samsung nx200. Further testing on other lenses (of the same) at the store revealed the same defect. Lue Lisää Translate to suomi