I did get dust spots from time to time with my older (pre Canon dust reduction) cameras also. It didn’t happen frequently and cleaning the sensor was a very small annoyance but an annoyance all the same. Starting with the XTi I have yet seen dust spots on my pictures which is nice.
Greg
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http://www.pbase.com/dadas115/
Greg
--
http://www.pbase.com/dadas115/