Tim is right. Selenium does not wear out or run out of photons, as if it has a finite amount. Corrosion or changing resistance in the contacts is almost always the culprit..
The in camera meters seem to fare better, with both selenium and CdS holding up reasonably well. My original Pen F still has a working meter.
Selenium meters do not "wear out" like a battery dying, regardless of how many times people repeat this on the web. Over time, the circuits may corrode which increases the resistance and will cause the meter to eventually fail.
Generally agreed. Including the "advice" to store in the dark, or, opposite, to regenerate with light.Selenium meters do not "wear out" like a battery dying, regardless of how many times people repeat this on the web.
Point taken.they are stressed by light, more precise UV light
I have an Optima II S that's working at least to some degree. Have not finished the first roll so the exposure could be off - we will see.Agfa Optima, first program-autoexposure camera ever (1958) may still work.
My experience shows that with cameras with lot of mechanics one hardly can say by model something on the chances.
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