Hi Michael,
About your questions 3 & 4 . . .there's quite an exhaustive
discussion in this PDF,
http://olympus.dementia.org/Hardware/PDFs/batt-adapt-US.pdf
The short version is that yes, for proper metering a stock OM-1 needs
a battery supplying 1.35 volts with a *flat voltage curve* over its
lifetime.
If you fit a silver oxide battery (~1.6v) into the compartment, the
metering will be quite badly off--but probably not by a constant
amount that you could correct by changing the E.I.
A good Olympus service shop can internally re-adjust the meter to
work correctly with 1.5v batteries. But that's going to be expensive
if you have no other reason to overhaul the camera.
The solution of finding a battery adapter is probably the best one.
These use a Schottky diode to drop the voltage of a 1.6v button cell
to 1.35 volts. You will want to use a silver oxide cell, because
alkalines have a sloping voltage curve. This seems to be the
best-known brand,
http://www.criscam.com/mr9.htm
but does anyone know of a cheaper alternative?
>was the OM-1 actually designed electronically around
>some specific characteristics of that type/voltage of mercury
>batteries, and what might those have been, that prevents any other
>battery from working right. Was it a current factor?
cheers,
-- Ross
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