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[OM] Re: Size of Spot Meter - OM-4(T)

Subject: [OM] Re: Size of Spot Meter - OM-4(T)
From: Winsor Crosby <wincros@xxxxxxxxxxx>
Date: Sat, 19 May 2007 17:38:50 -0700
Yes. The spot size does not change in relationship to what you see  
through the viewfinder. It still approximates the size of the  
focusing aid regardless of which lens you have mounted. If you are  
concerned about the DEGREE it measures, that varies with the angle of  
the mounted lens because it is a fixed area of the viewfinder.

In the OM4 series the meter is on the floor of the mirror box behind  
a lens. The secondary mirror mounted on the back of the main mirror  
bounces light coming through the semi-silvered center area of the  
main mirror down to the metering sensor at the bottom of the mirror  
box. That is why it stays the same regardless of the mounted lens and  
why it is oh, so easy, to use.



Winsor
Long Beach, California, USA




On May 19, 2007, at 3:51 PM, OM4 Land wrote:

>   Are you saying that if I use a 100mm lens, the spot will still be  
> the same size relative to the focusing aid or not? I thought it  
> would change but now I'm not sure.



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