Maybe the rear lens elements were coated with lead?
;-)
Bernd
----- Original Message -----
From: Rand E <rtomcala@xxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, March 29, 2001 4:15 AM
Subject: Re: [OM] Lens test loan request
> Gary, et all...
> It would seem to me that having any element of a photographic film
> camera (lens or any other part, for that matter) would seem to be
> counter productive. Seeing as how almost all radioactivity has that
> tendency to fog film. Some alpha and beta emitters lack the power and
> penetration to do a whole lot but under the right conditions, they too
> will fog film. The most common use of this is, of course, the common
> X-ray that we use for the detection of broken bones etc.
> Using my Navy Nuc training,
> Rand E.
>
>
>
> Winsor Crosby wrote:
> >
> > At 4:59 PM -0800 3/28/01, Gary Reese wrote:
> > >Garth writes:
> > >
> > ><< The [55mm f/1.2 Zuiko] lens' glass is supposedly slightly
> > >radioactive >>
> > >
> > >Actually, I don't know that yet. But the intense yellow of this lens is
> > >typically a clue that there is the possibility of one or more rare earth
> > >elements. What I don't remember is if a white piece of paper viewed
> > >through the lens takes on a yellow or yellow-green cast.
> > >
> > >I've arranged to borrow a early silver snout and a late black snout
> > >model of this lens to cover my bases in testing this hunch.
> > >
> > >Gary Reese
> > >Las Vegas, NV
> > >
> > Gary,
> >
> > Many long years ago when I subscribed to Leica Fotographie they
> > occasionally talked about their rare earth glasses. Since there has
> > been discussion of only using the Geiger counter with the 55/1.2, is
> > that way of making glass something that has come and gone? When it
> > was discussed years ago, it never occurred to me that there might be
> > measurable radiation for the mineral salts used to make the glass
> > even though were from rare earth metals.
> >
> > Winsor
> > --
> > Winsor Crosby
> > Long Beach, California, USA
> > mailto:wincros@xxxxxxxxxxx
> >
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>
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>
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