[EMAIL PROTECTED] commented:
> > > The best part is that you don't have to dig for special batteries. It
> > > uses regular 9V batteries.
ERNReed asked:
> > What does a selenium meter need a 9v battery for?
Jeff explained:
> I compared it to other Gossen meters that do require the now discontinued
> mercury cells.
One or more of us is confused. I used to have a ... I think it
was a Gossen Scout? Tiny, very simple, handheld light meter.
Window, needle, dial.
There was _no_ battery of any kind. It was powered by the very
light it was measuring.
Izzat a selenium meter?
Then again, I suppose that even if that was using a selenium
photodetector, one *could* add an amplifier circuit to make it
more sensitive in low light, and then there'd be a battery...
(As often as not, given my prediliction for "available gloom"
photography, the reading from that meter was basically, "It's
dark, dude." I guesstimated a lot. Or took a reading right
next to a candle, figured a ballpark number for candle-to-subject
distance, and applied the inverse square law. The meter was
far from useless, but a more sensitive one would be nice at
night.)
-- Glenn
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