Moose
It looks as if Pentacchio, from the K-7 onwards, has changed their shaker to
supersonic vibrator. However, they also have a dust location system, so I
don't know if that portends problems.
Chris
On 21 Feb 2011, at 06:10, Moose wrote:
> If you value the Oly "dust-shaker-offer-thingy" highly, you might want to
> look into how effective the Pentax version is.
> Early comparison tests of the others against Oly showed them to be quite
> ineffective.
>
> I seem to recall that Pentax is one of those who vibrate their IS mechanism
> vigorously to remove dust. From an
> engineering/physics view, this is bound to be less effective than exciting
> the surface with much higher frequency sound
> than the max rate the relatively heavy IS mechanism can manage.
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