On Mon, Nov 27, 2006 at 08:49:11AM +0000, mike wilson wrote: > > > > > From: "Digital Image Studio" <[EMAIL PROTECTED]> > > Date: 2006/11/26 Sun PM 10:22:36 GMT > > To: "Pentax-Discuss Mail List" <pdml@pdml.net> > > Subject: Re: K10D - what's that rattle? > > > > On 27/11/06, mike wilson <[EMAIL PROTECTED]> wrote: > > > > > I thought SR is based on magnets, with coils interacting with the > > > magnetic field to provide sensor movement. That's how it doesn't use > > > any power until actually functioning. Does this model have a > > > vertical/horizontal sensor? That seems a more obvious candidate for > > > unusual noise. > > > > It's based on electro-magnets which are on the floating plate on which > > the sensor is mounted acting against permanent magnets affixed to the > > body (front plate of SR assembly). So there is nothing to anchor the > > floating plate until the electro-magnetic coils are energized. > > Doesn't make total sense. If SR is off, the plate would be free to move. > Pentax specifically said that SR uses no power unless in action (not even > when activated) so the electromagnets can only be used when SR is working. > There must be something locating the plate when SR is off/not functioning.
I'm sure there is something (fixed magnet, spring mounting, etc.) to keep the sensor fixed in place if SR is not operating. The electro- magnets of the SR system would displace the sensor from the central 'home' position - they wouldn't be needed to hold it in place. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
