On Mon, Sep 25, 2000 at 08:05:51PM +1000, Stephen Border wrote:
> OK, you forced me to go and get my collection out.
>
I have two 50mm f1.8 that have sticky diaphragms and they both fall into
> the "OLYMPUS OM-SYSTEM ZUIKO AUTO-S 1:1.8 f=50mm Japan, Black Nose,
> MC, S/N on mount" category. I wonder if there was a change in
> materials/manufacture that make them more prone to this problem ?
>
Does they have a Date-Code on the black ring around last lens element?
They identify the batches the lens (or aperture?) was made. would be interesting
to compare.
Frieder Faig
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