In this instance, the camera taking the actual image(the camera with film)
is a medium format camera without OTF capability. Merely using the Om to
give an exposure reading would require extrapolating the exposure time for a
smaller f-stop and using a stop watch for the very long exposure times
needed. By simply firing the OM and using the length of time the shutter
was open to guide my exposure time for the medium format camera, life was
made much easier. My mistake was in not realizing that the OM would give
improper(but acceptable in this case) exposures since it had no film in it.
Hope this makes sense.
RonCrabtree
Santa Fe, NM
-----Original Message-----
From: ClassicVW@xxxxxxx <ClassicVW@xxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Date: Saturday, May 15, 1999 9:08 AM
Subject: Re: [OM] Slot canyon help and low light spot metering
>In a message dated 5/14/99 10:08:33 PM EST, jowilcox@xxxxxxxxxxxxxxxxxxx
>writes:
>
>Am I missing something in this "film vs. no film in camera" discussion? If
>you're just using the camera to take a meter reading, it doesn't matter if
>there's film loaded, the meter reading is "TTL" off the lower mirror not
off
>the film. If you press the shutter, the reading is then OTF, and you would
>be taking a picture (and hence getting the correct exposure for the scene).
> Having film in the camera only matters if you're pressing the shutter
>release, and comparing the exposure times between the two cameras; then, of
>course, the exposure time would vary and most likely be a couple of stops
>off, since then the
>"no film" situation creates reflectance problems.
> But if you're just using the meter in camera "A", and you're exposing
>film in another "OTF" camera, camera "B", then camera "B" should give the
>more correct exposure since it will vary the exposure time from the metered
>time as it is being taken. ( then you _would_ expect to see a difference in
>duration. )
>
>Right all?
>George S.
>
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