I recently bought an OM-1, and quickly discovered that using 1.5V
batteries does indeed lead to meter error of 0-2.5 stops---if I followed
the meter, I would underexpose by up to 2.5 stops (in very bright light),
though low-light readings seemed about right.
I shelled out $25 or $30 for a diode that the battery fits in, that
decreases the voltage and is supposed to let the meter work properly.
I use the 1.5V silver cell recommended for the unit.
On Saturday, I was shooting some pictures, and noticed that the meter
substantially violated the "sunny 16" rule, this time in the other
direction: if I followed the meter, I would overexpose by about 1-1.5
stops. It's not just the sunny 16 rule that makes me suspicious---I also
compared the meter to that of my OM-4. I do not know if this is a problem
related to the battery, or if the meter is broken, or perhaps just needs
calibration.
I need to use this camera on a once-in-a-lifetime (probably) trip to
Africa in a week and a half. How hard is it to calibrate the meter? How
would I do it? (I'm as handy with a tiny screwdriver as the next guy, but
probably not much handier.)
Thanks very much for any help you can offer.
--Phil
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