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Re: [OM] shutter curtains and metering

Subject: Re: [OM] shutter curtains and metering
From: Tom@xxxxxxxxxxxxx
Date: Tue, 9 Jul 2002 02:05:05 -0400
> >The metering system uses two CdS sensors to estimate
> >the shutter speed, but also has two silicon blue
> >sensors that read the light reflected off the
> >first shutter blind, or off the film when long
> >exposures are used.  During manual exposure, only the
> >CdS sensors are used.  
> 
> I've been wondering about this.  I understand that the
> first shutter curtain has a black and white checker
> pattern which is used to center weight the meter's
> sensitivity.  The OM-2 had two different versions of
> this, one more emphasized then the other.  However,
> what happens when the exposure is significantly longer
> then 1/60?  The checker pattern will have very little
> effect on the meters.  Are longer exposures less
> center weighted because of this?

Yes.

tOM--
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tOM Trottier,   ICQ:57647974    http://abacurial.com
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