On 2010-10-11 14:40:56 -0700, RichA said:

Pentax is now using the kind of ultrasonic sensor cleaning that
Olympus pioneered in 2003. The idea that cameras with sensors
unprotected and close to them mouth of the bayonet not having it is
insane. I never, ever had any dust show up on my Olympus DSLRs and
have only had one incidence of it with the G1, but the D300 has to be
policed for it all the time. That Sony doesn't have a good system on
the NEX is mind-boggling.

That is quite a slight of the D300(s). What evidence and reports of
such prolific sensor dust problems do you have with the D300(s)? Other
than hearsay that is.

Do you actually have the "Dust removal" feature activated? If so, what
setting do you use?
Check your Setup menu & "Clean image sensor" options.

My schooling with sensor dust removal and wet cleaning came with the
D70, which is truly a dust magnet, and remains so. I remain awash in
Eclipse fluid, PEC pads and sensor swabs, none of which have been
needed with my D300s.
After dealing with the D70 I am truly thankful to have a functioning
dust removal system in the D300s. I have mine set to "Clean at startup
& Shutdown" and I have never had to wet clean either my D300 or D300s,
even after changing lenses in windy, dust filled conditions.
One time I detected a piece of fluff through the viewfinder. That was
in the chamber, on the mirror, and that was taken care of by one on Mr.
Giotto's handy "Rockets".



--
Regards,

Savageduck