by Roger N. Clark
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This page shows examples of dust on "the sensor" of a digital camera as well as hot or stuck pixels. The dust is actually not on the sensor, but on the blur filter that covers the sensor. Stuck pixels are the same value regardless or exposure length or light intensity. Hot pixels are pixels with a higher dark current and increase in intensity with longer exposure time and hotter temperatures, again regardless of incident light. Hot pixels become more noticeable with high ISO low light images of long exposure and higher temperatures.
First Published April 20, 2009
Last updated April 20, 2009.