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Sensor cleaning how to guide by Canon

Sensor cleaning

Nice tutorial guide about how to do sensor cleaning by Canon Professional Network, and how to avoid the necessity for sensor cleaning.

Dust is a problem with all digital single-lens reflex cameras. It can enter the camera whenever you change the lens. This dust often finds its way to the glass filter that covers the digital sensor.

The sensor is made up of millions of light-sensitive elements, each around 6 to 8μm square. It does not need a very large piece of dust or dirt to cover one or more of these elements, or pixels. If a pixel is obscured, it does not receive much light and so that portion of the image will record as grey. These grey areas are most noticeable in light-toned areas of the photograph.

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