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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