Exactly, or a rectangle with pebbly glass cover elsewhere on the camera.
If the selenium area is small that meter is less sensitive to low
light than others with larger areas.
Chuck Norcutt
Leandro DUTRA wrote:
> 2008/4/4, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>:
>> Selenium is photo-voltaic meaning it generates a voltage on its own with
>> enough power to drive a meter without a battery. However, the output
>> power is proportional to the size of the piece of selenium and it
>> requires a pretty large chunk to move the needle on an exposure meter.
>
> Thus the translucent circle around Pen EE lenses?
>
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