It is a true spot meter reading only 2% of the image area. It reads a
circle slightly smaller than the focusing aid on the 2-13 screen. I
always used the inside split image circle as the best approximation.
That is probably not accurate, but close enough. You can seen the
sensitive area in the 1-4n screen on this page:
http://olympus.dementia.org/eSIF/om-sif/findergroup/focusingscreens.htm
Winsor
Long Beach, California, USA
On May 19, 2007, at 10:37 AM, OM4 Land wrote:
>
> Hi all:
>
> It seems everywhere I look I find different information regarding
> the size of the metered zone of the spot meter. Can someone set the
> record straight?
>
> What is the relationship between the spot and the focus aid of a
> 2-13 focusing screen with a Zuiko 50mm f-1.8?
>
> How about 28mm f-2.8 and 100mm 2.8?
>
> Thanks
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