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[OM] .......OM Mount Change?......

Subject: [OM] .......OM Mount Change?......
From: "TMLee" <clairetm@xxxxxxxxxxxxxx>
Date: Wed, 28 Aug 2002 08:29:34 +0800
Dear John...
How do I check if I have this problem ? I have the 90/2 and an OM4Ti
body.....

Just sent the OM4Ti for checking and servicing...

peace
TMLee






> Similar to a 90 f2 or 100 f2 on a 4T.  The coupling lever inside the body
> (which stops the lens down) hits the back of the lens in some way, jamming
> camera.
> _________________________________
> John Hermanson  www.zuiko.com
> Camtech, Olympus Sales & Service since 1977
> 21 South Lane, Huntington NY 11743-4714
> 631-424-2121 For Free Olympus manuals,
> please call 1-800-221-3000
> _________________________________
> ----- Original Message -----
> From: "Curtis P. Hedman" <Curtis.P.Hedman-1@xxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Saturday, August 24, 2002 9:36 AM
> Subject: [OM] OM Mount Change?
>
>
> > Another technical question for the List...
> >
> > I just received an OM-2n (thanks to Matt Crawley) and a Vivitar 90mm 1:1
> > macro (via Bill Barber), and have discovered a curiosity: there seems to
> be
> > some sort of interference between the protruding collar at the back of
the
> > lens and the innards of the OM-2n mount, but the lens mounts just fine
on
> > my OM-2s (as well as a Vivitar 3X converter). I also have a 55mm Vivitar
> > 1:1 macro (again courtesy of Matt Crawley) which has a similar collar
> > protruding into the body, and it mounts just fine on the -2n. I did some
> > measurements, and found that the 55mm lens collar is actually slightly
> > deeper, but the 90mm collar has a larger diameter. Hence my theory is
that
> > Olympus made a slight revision to the mount design between the -2n and
the
> > -2s to give a slightly larger clear zone for protruding rear elements,
> etc.
> > The other possibility is that there are normal tolerance variations at
> play
> > here, and the two bodies I tried the lens on are at opposite ends of the
> > spec range...
> >
> > So has anyone had similar experiences? How about actual dimensional data
> on
> > the OM mount and the clear zone behind it? This sort of thing always
makes
> > me curious, beyond the normal questions of utility of the lens, quality,
> > etc. - I like the lens (going all the way to 1:1 is convenient) and plan
> to
> > restrict its use to the -2s, but inquiring minds want to know....
> >
> > Curt
> >
>
>
>
>
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>
>



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