In order to compensate for camera shake, it goes without saying that accurate sensors to detect these shakes are necessary. This alone, however, is not enough. A fast and accurate drive mechanism (motor) is also necessary. Unfortunately there are limits to the use of traditional electromagnetic motors. That is why OLYMPUS came up with the SWD (ultrasonic vibration driven motor) for camera shake compensation.

Fast moving and accurate compensation achieved through SWD offers high levels of compensation effectiveness.

* E-410 / E-420 has no camera shake compensation.