After I read some reviews about purification kit for DSLR cameras, I chose the company Pentax. Its soft, something detentionable plastic head covered an area of about 10 x 10 mm and sits on a 13 cm long stem. Each swabbing the captured dust on an adhesive film must be stamped. The swabbing has happened several times in the same place sometimes. The work is best done in a dust-free room (eg bathroom). For the control of the sensor makes it a shot in the macro range and enlarges the picture. The visible dust on the sensor is held, for example the upper left corner then the bottom left. In full-frame sensors, the matter is somewhat complicated.
