Archived posting to the Leica Users Group, 2003/05/14

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Subject: RE: [Leica] Replacement PX625 batteries
From: "Frank Filippone" <red735i@earthlink.net>
Date: Wed, 14 May 2003 07:34:54 -0700

I want to clarify what it takes to change over the circuitry in most analog
metering  cameras from the older 1.35v batteries to the new, 1.5v type.

It takes the change in 1 or 2 reisitors.  No more, no less.   The large
labor charge is both profit and time to get inside the camera for the change
and the calibration itself.  The parts are to say the least a meaningless
cost.

The metering difference between the 1.35v batteries and the 1.5v batteries
is in the order of 1/3 or less of an F stop.  Hardly a thing to worry about,
given the metering style of most of us.  If you had a 1degree spotmeter, and
a film that had virtually no lattitude, then the difference would be
important.  But hey, you are using modern emulsion films, lots of negative
film, metering is at best case a user intelligence thing to get really
accurate readings.. so why all the upset?

You have 3 choices...
1) get your camera recalibrated
2) use the CRIS adapter
3) use the new batteries and change your ASA by 1/3 of a stop to take into
account the differences.

They will all work.

Frank Filippone
red735i@earthlink.net


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