Re: [OM] Another radioactive Zuiko!

[Gregg Iverson]

I wonder if the slightly yellow color of the front element is why I have 
always preferred using the 50/1.4 with  b&w film.  Maybe it acts slightly 
like a yellow filter.
Gregg

Mark wrote:
> Hi all,
>
> After Gary Reese emailed me with the results that my Zuiko 55/1.2 was
> radioactive, I decided to test an early (and pretty ugly) silver-nose Zuiko
> 50/1.4 I have which has a yellow appearance similar to the 55/1.2.  It is
> also radioactive!   Gary found that radioactivity was emitted from both the
> front and rear of the 55/1.2, while the 50/1.4 is strongly active from the
> front, but not as active from the rear.  This suggests that a) the
> radioactivity is attenuated by the other elements, and b) the 55/1.2 has 
> more
> than one rare-earth element, while the 50/1.4 only has one, probably the
> front element.

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