Great explanation! We still here! Me thinks we still some in inventory. Paul.
Frank van Lindert wrote:
> On Fri, 13 Feb 1998 13:14:37 GMT, kyu@xxxxxxxxxxxxxxx (Volkhart
> Baumgaertner) wrote:
>
> >Yo,
> >
> >very recently, I acquired a very nice OM-F, which I wanted to have because
> >(besides from just loving to use OMs) I think its electronic focusing aid is
> >quite an interesting step in camera-technological evolution.
> >>From a book I have (Olympus Fotoschule, in German, by Richard Hünecke; real
> >good) I learned that there is something called an IN FOCUS cord that is used
> >to connect the camera to a winder which it triggers when the subject comes
> >into focus.
> >I figure that it goes into the jack to the right of the lens mount on the
> >camera. I have never seen one of these cords for sale anywhere. Are there
> >any sources that might be able to supply one?
>
> Hello Volkhart.
> The camera is really nice, considered from the Olympus history point
> of view. Only one AF lens has been made for it.... the 35-50 zoom with
> slef contained AF mechanism and batteries. (BTW, this lens gives
> autofocus capacity to all OM bodies).
> But all other Zuiko OM-system lenses fit on this camera too, and then
> what is left of the AF system is an electronic focus system. You turn
> the lens into focus, and when it snaps a green LED will tell you so.
>
> Now for the In-focus trigger cord, indeed for use with a motor drive
> or winder.
>
> With a normal (non AF) lens the cord goes between the socket on the
> camera body (in the place that you indicate) and the remote socket on
> drive or winder. The shutter release built in the drive connector of
> the cord takes the place of the button on the drive itself. If you now
> sewt a focus distance on the lens and press the button on the cord
> socket, the camera will not immediately release but wait until a
> subject comes into focus. Then the picure will be taken. You can even
> lock the button, and then (provided the drive is in sequence mode)
> shooting will go on as long as a subject is in focus.
>
> With an AF lens (the AF lens, I must say) and whatever OM-body the
> cable will be connected between a jack on the lens itself, and the
> drive as before. These combinations will let you make sharp pictures
> of moving subjects! The zero-in electronic-focus, as the system is
> called, will keep the moving subject in focus. Of course the drive or
> winder must be in sequence position again...
>
> The drive end connector of the cord is filled with electronics. I am
> quite capable of doing some elctronics myself (although not the
> professional you are or have been) but I would strongly discourage you
> when you have the idea to build a cord like this. I haven't even
> bothered to try and find out what the elctronics functions are...
>
> There is no reason for it - the cords are rather often for sale in
> different shops, for odd prices ranging from $3 (which I paid for mine
> at Wall Street Camera) to $25 or more.... $10 is a fair price.
> If you want me to help to find you one locally email me personally. I
> think I know a source here. I think in Hamburg you will find a large
> photoshop which has a 'Fundgrube' where you can find one as well.
> And maybe the unevitable Olympus guy will jump in, when reading this
> ;-) hello, Paul ;-)
>
> Hope this helps,
>
> BTW, read p. 92 of your (indeed beautiful) book for more details.
> Or is that where your question came from...?
>
> Frank van Lindert
> Utrecht Holland.
> >An alternative might be to make my own cord, which I suppose - having been
> >an electronics technician - can't be very hard to do. Some technical
> >information would make this easier (hint: John Hermanson, if you could
> >provide any info it would be highly appreciated), though, especially: What
> >kind of plug does the jack take? It looks like the 2.5 mm version of the
> >typical earphone plug used in many small radios etc. (which use the 3.5 mm
> >version, though) might fit; I don't want to try, though, for as long as I
> >don't know what's inside there is no way to know whether I might cause
> >damage trying a wrong plug. And what exactly does it do? Does it just short
> >two contacts, acting like a switch (which would allow me to connect it to
> >the remote jack I put into my el cheapo no-name winder) or does it put out
> >some kind of an electrical impulse?
> >
> >
> >MtFbwy,
> >Volkhart
>
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