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[OM] OM2n meter weighting pattern. Was: OM2n exposure

Subject: [OM] OM2n meter weighting pattern. Was: OM2n exposure
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Sat, 14 Feb 2004 07:09:15 -0500
Didn't someone already suggest firing the camera after removing the 
batteries?  That will interrupt the exposure cycle after lifting the 
mirror and exposing the shutter curtain.  At that point you can examine 
the curtain's black and white speckled metering pattern.

If it's center weighted there will be more white speckles toward the 
center of the curtain.  If it's an averaging pattern they will be evenly 
distributed across the entire curtain.

Replace the batteries to allow the camera to complete the exposure cycle.

As I recall, there were two different patterns used in early and later 
OM-2's.  I don't know if there was ever more than one pattern used in 
OM-2n's.  I suspect it's the same as the later model 2's.  Anyhow, 
examining your own shutter curtain will answer the question for your 
particular camera.

Chuck Norcutt

Moose wrote:
> I've been waiting for someone more knowledgeable to answer, but they are 
> being coy. I would swear that I've seen graphs of this, but I can't 
> remember where. Generally, I think you can assume that 'most' of the 
> sensitivity is in the central 1/3 of the viewscreen. Not very 
> scientific, but that'a the impression I gained using a 2n for many years.


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