Canon has developed a comprehensive approach to deal with the potential problem of dust on digital SLR camera sensors, based on the three concepts of Prevent dust generation, Prevent dust adhesion, and Remove adhered dust. In addition to using dust-resistant materials and mechanisms that prevent generation of dust within the camera body, anti-static treatment also prevents dust from adhering to the sensor. And if any stray dust should adhere, Canon has developed a self-cleaning sensor unit that produces ultrasonic vibrations to remove dust from the filter protecting the CMOS sensor.
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