“The Super Sonic Wave Filter is positioned
between the shutter unit and the low pass filter in front
of the image sensor, and it automatically cleans itself
by vibrating over 30,000 times per second every time
the power is switched on.
Dust particles dislodged from the surface of
the filter are then collected in a dust trap at the bottom to keep
them out of circulation.
“Further protection against dust contamination is effected
by hermetically isolating the image sensor and low pass filter
from the Super Sonic Wave Filter.
And because the supersonic drive does
not generate static electricity, there's no danger
of it attracting dust during extended operation.
The Olympus Dust Reduction System goes even further,
breaking not just static electric bonds, but also
molecular attractive forces that cause dust to adhere to the filter.
“And since there will always be some microscopic particles
of dust that cannot be dislodged, the distance from
the Super Sonic Wave Filter to the image sensor is
carefully calculated to minimize the effect they have
on actual image quality.
“It all comes down to the fact that lens interchangeability is
really what SLR photography is all about.
And with the Olympus Dust Reduction System,
digital photographers at last have the freedom
to change lenses unhesitatingly, whenever they like.”