Originally Posted by
Sevo
Strictly speaking no. While ageing drift on the cells obviously will alter results where some other parts will not interfere with the metering until they fail entirely, cells are no more sensitive to ageing than any other component. Indeed, as far as my adjustment attempts on old meters and cameras go, the mechanical needle instruments on older meters and A/D converters on digital ones usually seem to be the first part that develops a non-linear error that cannot be compensated any more, while the cells mostly still continue to be linear, with some decrease in sensitivity.
Some selenium cells are particularly prone to corrosion damage - but the Norwoods/Sekonics, Westons and Spectras we now mostly encounter as still working selenium meters are fairly immune against that, the vulnerable types mostly have vanished by now.
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