Olympus E-500 - EVOLT Digital Camera Брошюра и технические характеристики - Страница 5

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Olympus E-500 - EVOLT Digital Camera Брошюра и технические характеристики
clean:
"Supersonic Wave Filter" – the unique
dust-protection system from Olympus.
In photography, it's rare to get a
second chance to take the shot. If the
moment is missed, it's gone. The most
captivating picture can be ruined by
the tiniest of dust particles that enter
the camera body during lens changes.
In analogue cameras, dust particles
move with the film as it winds forward
so that in most cases only one single
picture is affected. In digital cameras,
however, dust particles that settle on
the image sensor stay there, accumu-
late over time, and affect every picture.
Merely microscopic particles can cover
several hundred pixels on the CCD.
Attached lens:
avoids dust getting inside
camera body.
That not only spoils pictures but also
requires professional cleaning, which
costs time and money.
The effective solution
for the E-500:
The Supersonic Wave Filter is located
directly in front of the highly sensitive
CCD. Powered by an ultrasonic
generator, it produces vibrations that
shake off the particles of dust. They
then adhere to a specially-coated
membrane inside the camera body
and no longer pose a risk to image
quality. This process takes mere
milliseconds and is executed each
time the camera is turned on or
whenever Pixel Mapping is invoked.
Lens change: dust particles
have landed on the dust filter in front
of the image sensor.
Activation of the Supersonic
Wave Filter: the dust particles
are shaken off.
Shutter
Supersonic
Wave Filter
CCD
Low-pass filter
Clean image sensor:
no dust particle can affect
image quality.