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[OM] RE: olympus-digest V2 #3892

Subject: [OM] RE: olympus-digest V2 #3892
From: "danrich" <danrich@xxxxxxxxxx>
Date: Fri, 14 Feb 2003 09:29:07 -1000
Stupid question, is that 2/3 of a stop more or less?
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Date: Thu, 13 Feb 2003 18:30:38 -0800
From: Moose <olymoose@xxxxxxxxxxxxx>
Subject: Re: [OM] Spot-metering madness

That can't be right. I don't know how the spot meter is supposed to be 
adjusted, but here either spot or average is clearly out of adjustment 
if the testing methodology is near correct, i.e. lighting is actually 
even. The fact that the error is there with 50mm standard lenses 
indicates it isn't just the 'angle of incoming rays' effect. The average 
error over all those lenses from 14-300mm is 2/3 of a stop. If the the 
metering that is off were adjusted by 2/3 stop, the average error would 
be about zero and only 5 lenses would be out by more than about 1/3 
stop, certainly a better situation than the current one.

Carlos,
Your comparison is made in such a way that it seems to assume that the 
spot meter is wrong. I don't see where that is necesarily the case, it 
could be either. If you know or can determine through bracketed tests 
with slide film, which one is off, you could, at least in the short run, 
simply adjust the exposure compensation dial by 2/3 stop when switching 
Modes. That would put you close enough that you would be assured of 
acceptable exposures with most of your lenses.

Moose

John Hermanson wrote:

>...get used to it.........


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