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Re: [OM] OM1 metering

Subject: Re: [OM] OM1 metering
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Wed, 3 Sep 2003 17:53:37 -0400
Before we go any further (and possibly into a frenzy) if that is the OM-1 I
did in April, it is still under warranty.  I won't guess any further what
might be wrong with it.  I'd like to inspect it first.
----------------------------------------------------
John Hermanson  www.zuiko.com
mail:  omtech@xxxxxxxxx
Camtech, Olympus Sales & Service since 1977
21 South Lane, Huntington NY 11743-4714
631-424-2121  Turnaround 4-5 weeks
----------------------------------------------------
----- Original Message ----- 
From: "Moose" <olymoose@xxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Wednesday, September 03, 2003 2:54 PM
Subject: Re: [OM] OM1 metering


> Jim Brokaw wrote:
>
> >Boris -- I have two thoughts:
> >
> >-- The meter was broken and fixed... perhaps the fix has failed and the
> >meter needs repair again?
> >
> The meter should NOT change reading when tapped! It should move smoothly
> and easily as the aperture and speed are changed. Tapping firmly with a
> finger causes it to wiggle a little, but come to rest where it was.
> Whether it was not completely fixed before or has gone bad since, it is
> clearly not working properly. There is dirt in the meter housing, broken
> pivot jewel, bent or out of place spring, etc. etc., causing friction in
> the meter mechanism. Who fixed it, and when? Do you have recourse to them?
>
> >-- The shutter speeds below 1/60 are inaccurate, so even though the meter
is
> >accurate, when you think you are getting 1/15 your speed is actually
1/25,
> >and so forth...?
> >
> My understanding is that this was daylight and you switched from higher
> speed and wider aperture to lower speed and smaller aperture to get
> motion blur. If so, this is not a case of the meter not being correct in
> low light, but of exposure not being correct at low shutter speeds
> and/or small apertures. My experience with the OM-1 meter is that it is
> accurate down to about the point where I can't see the needle anyway, so
> further low light range is academic anyway.
>
> In addition to Jim's speculation about shutter speed accuracy (there are
> 3 different mechanical shutter mechanisms for dfferent speed ranges, so
> it can be right on at one set of speeds and off at others.), there could
> be a problem with the aperture reporting and/or stop-down mechanisms in
> lens or camera or the mechanism that conveys aperture and shutter
> settings into the meter. These are less likely than speed problems, but
> possible. The OM-1 seems like a simple camera, particularly to those who
> trust mechanical over electronic, but the whole process of TTL exposure
> involves several subsustems and components.
>
> >Either instance suggests that a CLA and repair of this body might be
needed... and you know where to send it <g>.
> >
> If it is still under warranty, you should look for further repair or
> refund. If it was not an Oly specialist, you may need to avail yourself
> of John or Clint's services.
>
> Moose
>
>



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