John,
I think you are trying to pursuit a good Zuiko 75-150, I can't really
provide much help there. But I do got a very nice sample, I have some
portraits shot at around 100mm wide open, the resolution and sharpness
just great. This is one of the Zuiko that provide most pleasing
contrast and color (to my eyes). The distortions are a bit high on
both ends though.
C.H.Ling
John Hudson wrote:
>
> Does anyone know the approximate dates of manufacturer of the following
> 75/150 f4 Zuiko zooms?
>
> s/n 230*** and s/n 408***
>
> If the dates of manufacture are not known can anyone date either one of
> the serial numbers by reference to the purchase date of their own zoom
> lens and the proximity of their lens' serial number with either one
> shown above.
>
> In addition to the dating of these two serial numbers does anyone know
> whether the formulation of the lens design would have changed for the
> better or the worse between the two serial numbers or whether the 75/150
> was a mass produced lens changing little if any during the course of the
> entire production run.
>
> John Hudson
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