John Francis wrote: > 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" <[email protected]> >>>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. > >
That would be my idea, too. What Rob is suggesting is equally possible, if a rather fly use of language by Pentax regarding its effect on battery life when in use. But I can't imagine, in that case, that battery life would not be affected quite noticably and I haven't seen anything untoward mentioned. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
