Digital SLR Cleaning Methods
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Vacuum Systems
These use an aerosol air duster can with a small venturi attachment and a thin hose to produce a vacuum which is used to pull contamination from the sensor. Because the vacuum effect is limited and the hose is quite thin, it takes some time to cover the entire sensor. Aerosol propellants are quite expensive and generally not good for the environment. This method will only deal with loose dust particles.
Good Points – Sensor is not touched ( if you are careful).
Bad Points – Expensive, Fiddly to use; Only removes loose dust.