I've seen dust on images from p&s digis. Too many moving parts to
absolutely keep the dust out.
For a couple years I could afford two identical bodies and lenses
dedicated to them. They were pre dust-removal in the bodies so, even
without ever changing the lenses, the sensors needed cleaning at
least once a month when I was shooting every day.
Then I bought a 7D and the entire problem vanished.
But my supposedly well gasketted 7D, advertised as protected against
moisture and grit by professional quality seals, has died due to salt
water moisture in only 15 months. $1300 down the drain.
I bought a 60D to replace it. No gaskets but half the price and it
still has dust removal.
--
Emily L. Ferguson
mailto:elf@xxxxxxxxxxxxxxxxxx
508-563-6822
New England landscapes, wooden boats and races
http://www.landsedgephoto.com
HOT OFF THE PRESS! SAILING SEPIA IMAGES VOL II:
http://www.lulu.com/spotlight/elfpix
Check out my Spring daily photograph project at:
http://tinyurl.com/3a6m7g6
And Summer:
http://tinyurl.com/22juo5s
Autumn now complete here:
http://tinyurl.com/26pdgz9
Winter concluded here:
http://tinyurl.com/2co5wkg