What exactly are rare earth..."I just wanna celebrate
another way of livin"...sorry had to get that out. What
are rare earth elements? I have a very clear and scratch
free 50mm F1.4 G Zuiko, just for collection...
On Fri, 26 Apr 2002 00:29:19 +0200
"Roger D. Key" <rdk@xxxxxxxxxx> wrote:
The rare earth elements cause the earlier lenses to go
yellow as they age
(also some early 1.4's).
Note that the 50mm/1.2 is generally a better lens than
the earlier 55mm.
Roger Key
Recently there was discussion about the rare earth
elements used on the
55mm
f1.2 lenses. As I appear to have missed the earlier
thread can someone
refresh my memory on the significance of the rare earth
elements. Also the
breakpoint in the serial nos. at 137000. As I do not know
the significance
of the rare earth element which is a better lens - the
earlier or the later
version, both optically and from the collecting point.
Dinkar
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