What is the little blue button on top of my SLR digital camera labeled SSWF?I just bought a used Olympus SLR camera and sometimes it won't show any sign of life at all except for a little blue light on top that reads, "SSWF" underneath it. So, what is this light for and why is it all that I can get to work and not even know what it means? I feel stupid enough, so be kind.
RC
It is a feature called Supersonic Wave Filter - it shakes dust off the image sensor by using supersonic wave vibrations. The dropped dust is affixed to a dust-collection component under the filter. This helps preventing to have unwanted dust or lint (not sure about lint, yet) from appearing on your picture, and help saving your sensor.
It is not necessary to clean or change the dust-collection components under normal use for several years. The dust-collection system can easily deal with the particles that are a result of the dust-reduction system. If the camera is used constantly in severe conditions, Olympus recommends that the camera body be sent to an authorized Olympus repair service center approximately at an interval of three to five years. As part of Olympus' camera service maintenance, the dust-collection components are replaced.
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