The IS-3 computes exposure through the mirror, reflected to the cell in the
floor, before the mirror goes up. At this time, exposure info goes into
memory.
Flash exposure is based on distance (similar to Olympus Flashmatic used in the
35RC etc.).
John
Ken Norton wrote:
> The IS-3 has a sensor in the bottom of the mirror box similar to our OM's.
> I looked through every page of documentation and didn't read anything about
> this sensor or OTF metering of any kind. What is it, and what does it do?
>
> Ken Norton
>
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