>I believe it was AG who said that a very few, early 50/1.4s had
radioactive element(s).
The accuracy of that claim is in question. A fellow listmember, with access
to a Geiger counter, confirmed that his samples of the 50/1.4 and 100/2.8
didn't glow in the dark. We compared serial numbers and other
characteristics and our specimens were pretty close.
The 50/1.4, especially the early ones, were incredibly sharp in the central
area. The biggest problem I had with it was the complete lack of
flat-fieldness. At minimum focus the plane of focus curved by almost 5mm.
Early Zuikos are quite warm. Personally, I prefer the older ones to the
later MC, blacknosed variety. The lone exception is the 24/2.8 of which I'm
on my second one. Yes, I actually wore a lens out. ;) The flare-resistance
of the early wide-angles was pretty poor.
AG
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