Hi,
Somebody suggested that a miniature vacuum cleaner could drag in and
deposit more dust that it removes - when cleaning camera mirrors and
screens, etc.
I don't believe this could be true. And by the way, if true, how is it that
carpets are usually cleaner after being vacuumed than before?.
Think about it. The concentration of dust in incoming air is extremely low.
Probably much lower than for the mirror etc being cleaned. Also, incoming
dust has by this time attained a velocity equal to that of the air it's in and
there's no way it will escape that air train and avoid being caught in the
cleaner dust-bag. The moving air and its contents ultimately are all going one
way. Away from the camera.
Brian
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