Archived posting to the Leica Users Group, 1997/01/07

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Subject: Re: Battery for MR Meter
From: Marc James Small <msmall@roanoke.infi.net>
Date: Tue, 07 Jan 1997 08:25:29 -0500

Most European camera gear designed for mercury batteries contains regulated
circuits which allow the use of silver-oxide or alkaline batteries without a
loss of accuracy.  I used my MR-4's for two years on silver-oxide and they
were well within 1/6 stop.

The Japanese designers relied on the flat discharge rate of the mercury cell
and did not, as a rule, build voltage regulators into their circuitry.
Thus, most Nikon and Canon, &c, gear DOES require an adapter or Wein cell to
maintain accuracy.

Thus, worry not about batteries.  Convert to obtainable power sources and
keep on clicking!

Marc

msmall@roanoke.infi.net  FAX:  +540/343-7315
Cha robh bas fir gun ghras fir!