frieder.faig@xxxxxxxxxxxxxxxxxxxxxxxxx wrote:
>
> P.S: Qutation :"Objektive: OLYMPUS OM-APO TELE 11,0/1000 mm mit bzw. ohne
> 2fach
> Telekonverter." - How long since that this lens is called APO? - Have there
> been any changes
> in optics or only in labeling?
>
I believe the 1000mm has always been an APO. It uses an old formulation
that does not require high density glasses or fluorite crystals. By the
same token it cannot be made very fast. Apochromatic lense designs have
been around for a long, long time.
Jerry Liles
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