I spot metered a medium area of the canyon, adjusted both cameras
>>to the same f-stop, fired the empty OM and then immediately opened the
>>Pentax as a time exposure. I closed the Pentax when the OM closed its
>>shutter.
>
>snip
>>
>>I feel badly using my beloved OM4t as a mere meter, but it performs very
>>well in this role.
>
>Hi Ron,
>
>This is interesting, since your exposure is determined by an OTF metering
>system which presupposes the density and reflectance of film to get the
>correct exposure times (or so I thought). One would think you might get
>over-exposures. If not, perhaps the somewhat longer times doing OTF
>exposures without film help check the potential of reciprocity failure?
>
>Have you ever done this technique with film in the OM-4T?
>
Dear Joel:
You are correct. As the OM4t manual clearly states, using an empty OM4t
will falsely overexpose the scene. The only other time I have ever used the
Om4t in a slot canyon was when I was using it to shoot film. Oddly enough,
though, my exposures this time using the empty OM4t as a meter for my Pentax
67 were fine. It may well be that when one uses exposure times of 30-60
seconds, the variation of exposure times between using film in the camera
and not may be insignificant in proportion. What do you think?
Ron Crabtree
Santa Fe, NM
-----Original Message-----
From: Joel Wilcox <jowilcox@xxxxxxxxxxxxxxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Date: Friday, May 14, 1999 12:23 AM
Subject: Re: [OM] Slot canyon help and low light spot metering
>At 06:47 PM 5/13/99 -0600, Ron Crabtree wrote:
>>
>
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