When it looks dirty.

ive never cleaned a sensor
I am surprised by the variation.
It must be that some are less bothered by dust spots or don't see them?
since buying an arctic butterfly I've not needed to have the sensors on either camera wet cleaned - prior to that the 20D got done maybe twice a year, and 40D (which has the self cleaning vibration thing) maybe half as often
apart from the risk of damaging the aa filter - seriously during every lens change, isn't that a tad excessive
I am surprised by the variation.
It must be that some are less bothered by dust spots or don't see them?


My 5DII has sensor cleaning but still needs cleaning about once a year.my camera says it is cleaning the sensor everytime I switch it off so I never do it - wouldn't know how