Just ask Cotty.  Last year at GFM he was using a zoom
to do some ground-level macro shooting around the
dusty campsite.  His sensor looked like the inside of
a vacuum cleaner afterwards.


--- Igor Roshchin <[EMAIL PROTECTED]> wrote:

> 
> Can a zoom lens be used as a vacuum cleaner?
> (cleaning the space around, and collecting all that
> dust on the sensor)
> 
> A fellow on dpreview forums claims that operating
> zoom on Pentax 
> 18-250 provides suction that leads to dust
> penetrating inside the lens.
> 
>
http://forums.dpreview.com/forums/read.asp?forum=1036&message=27304333
> 
> Any comments?
> 
> Has anybody seen any objective results about this
> suction effect in
> zooms? (Most zooms do not have dust-sealed design,
> so this effect should
> not be limited just to this lens.)
> 
> Igor
> 
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