Body dimensions are:
>From lens flange to film plane (inner rails): 46.05mm
>From lens flange to outer rails: 46.19mm
John Hermanson
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----- Original Message -----
From: "Chris Charlton" <c_charlton@xxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, July 19, 2001 8:49 PM
Subject: Re: [OM] Critical OM1(n) measurements needed
| Try locking the mirror up, then (if memory serves me)
| advance the lever (with no film in) and operate the
| self timer with the speed set to "B", as soon as the
| shutter opens and you can see the pressure plate
| through the lens flange, operate the lever to halt the
| self timer from winding on (thereby locking the
| shutter open), use a vernier caliper to measure the
| distance from the flange to the film pressure plate.
| If you want to be super accurate, measure the
| thickness of a piece of film and add that to your
| final figure.
| To close the shutter afterwards, make sure you have
| nothing inside the camera (vernier etc) operate and
| lever for the self timer (and the shutter should close
| again at the end) and flip down your mirror.
|
| Chris
|
|
| --- Bill and Pam <clar132@xxxxxxxxxxxxx> wrote: > Hey
| all,
| >
| > I have been using my OM1(n) for
| > astrophotography (as well as regular photography)
| > for some time now. Any other astronomers out there?
| > I now want to get a bit more picky with my exposure
| > times. To do this, I need to know the distance from
| > the film plane to where the lens rotates on (I
| > forget what this part is called; lens flange?
| > camera flange?). Does anyone out there have such a
| > measurement? Maybe our friend John H.? I would try
| > to do it myself, but I do not want to damage the
| > shutter or anything (no tools to measure here). Any
| > experts out there?
| >
| > Please respond to the list as I will be offline.
| >
| > Thanks in advance!!!
| >
| > -Bill Clark
| >
|
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