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Re: [OM] Focusing Screen 2-13 on a OM-2(N)

Subject: Re: [OM] Focusing Screen 2-13 on a OM-2(N)
From: Mark Dapoz <md@xxxxxxxxxxxx>
Date: Tue, 16 Apr 2002 13:06:57 -0400 (EDT)
On Tue, 16 Apr 2002, Mike Cormier wrote:

> In an OM-1, the cds cells that operate the light meter are located above the 
> focusing screen, next to the eyepiece.  When you change to the clearer 2 
> series screens, the amount of incident light falling on the mater is changed 
> and thus gives a couple of stops of error.  In an OM-2 this is not a problem 
> because light is read from the film plane.  An OM-1 would have to be 
> modified to give the correct reading.

Actually, it is also a problem for the OM-2.  The meter needle uses a set of
cds cells around the eyepiece just like in the OM-1.  Only auto exposures
are taken off the film, and those will be correct.  The meter needle will
be incorrect though.
                                -mark


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