No, he is talking about the visible dust spots. While the sensor cleaning function on the new canon's might be helpful, you'll still need to clean the sensor manually. I usually just use a blower and it gets most or all of them. There are other methods where you actually wipe the sensor, but I wouldn't try it myself because the sensor is very fragile and VERY expensive to replace if you damage it. Otherwise, you can take it to canon and they'll charge you $50 to do it!
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