Dust is a much greater problem for digital cameras than for 35mm film cameras.   With SLRs in particular there is a real risk that dust will enter the camera while the lens is being changed. With film cameras dust particles move with the film as it is wound on so that only one picture is normally affected. In addition dust may be also caused from within the camera.

However, if a dust particle falls on a digital camera’s image sensor, it normally remains there, to be joined by more dust particles. Not only that but the individual pixels are so miniscule that even the tiniest dust particle may cover several sensors, and over time this will lead to a significant deterioration in image quality.

Security of dust free images Automatic dust reduction Less service and editing efforts are required