In a message dated 2/15/99 7:57:00 AM Eastern Standard Time,
rdavies@xxxxxxxxxxxx writes:
<< I notice that the shutter curtain on my recently acquired OM4Ti has the
characteristic random checkerboard pattern indicative of off-the-curtain
exposure measurement. I was under the (obviously mistaken!) impression that
when the OM4Ti is not using spot metering, it uses off-the-film exposure
measurement. So, can anyone tell me under what circumstances the OM4Ti
measures light off the shutter curtain? >>
The OM-4(Ti) uses OTF/OTC metering in the center-weighted auto mode. How much
of the reading is off-the-film (OTF) or off-the-curtain (OTC) is a function of
shutter speed. For fast shutter speeds (faster than, say, 1/60), most of the
reading is done off-the-curtain. As speeds get slower, a higher percentage of
the reading is integrated off the film instead.
Hope this helps,
Paul Schings
Coventry, RI
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