Few years ago, Canon introduced some sort of internal sensor cleaning system that (as far as I understand it) shakes the sensor off any dust it collected during use. This shake is very high frequency.
Questions
- How effective is this system? What kind of dust is it actually able to remove? What's your experience.
- Where does the removed dust go? As it probably stays inside how likely is it that it land on the sensor again?
- Has the system been improved since its introduction?
- Does Nikon have equivalent system that works in a similar fashion or do they have something else (or nothing at all)?