Difference between revisions of "PX625"

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Before mercury batteries were banned, many cameras were designed to use them.  Because mercury batteries produced a constant and reliable voltage, so many cameras were built without any voltage regulation in the metering circuitry.  Now that we can only get alkaline batteries, the classic cameras many of us love give erratic exposures and meter readings.
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The '''PX625''' (also referred to by other names) is the mercury battery for which the greatest number of camera models were designed.
  
Rick Oleson offers some [http://rick_oleson.tripod.com/index-111.html suggestions] based on ideas from [http://topconcollection.home.att.net/index.html Leon Schoenfeld] to make your classic cameras give acceptable meter readings using modern alkaline batteries.
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Before the manufacture of mercury batteries was banned, many cameras were designed to use them. Because mercury batteries produced a constant and reliable voltage, many cameras were built without any voltage regulation in the metering circuitry. Unless preventative measures are taken, use of other kinds of batteries gives erratic exposures and meter readings.
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==External links==
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*[http://rick_oleson.tripod.com/index-111.html Suggestions] from Rick Oleson (based on ideas from <!-- http://topconcollection.home.att.net/index.html Dead link --> Leon Schoenfeld) to make classic cameras give acceptable meter readings using modern alkaline batteries.
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*[http://rick_oleson.tripod.com/batt_adapt_us.pdf The mercury cell problem and its solutions] (PDF file) by F. de Gruijter. Also discusses PX675 and other mercury batteries.
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*[http://www.buhla.de/Foto/eQuecksilber.html The mercury oxide battery problem], at [http://www.buhla.de/Foto/Konica/eKonicaStart.html Konica SLR system], providing information about the PX625 and PX675 battery that is not specific to Konica models

Revision as of 07:26, 11 October 2006

The PX625 (also referred to by other names) is the mercury battery for which the greatest number of camera models were designed.

Before the manufacture of mercury batteries was banned, many cameras were designed to use them. Because mercury batteries produced a constant and reliable voltage, many cameras were built without any voltage regulation in the metering circuitry. Unless preventative measures are taken, use of other kinds of batteries gives erratic exposures and meter readings.

External links