What are SSM-lenses?
SSM (Supersonic-wave Motor) Lense uses the nature of piezo-electric element, which changes shape when voltage is applied. Compared to conventional DC motors, the supersonic-wave motor has characteristics that fit the lens drive, such as producing high torque from slow rotation and providing quick start and stop responses. By employing this motor, the SSM lenses provide ultra-quiet, ultra-smooth and superior AF operation.
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