I recently picked up a Tokina SMZ 80-200 3.5-4.5. This lens is an
external focus one-touch with macro at all zoom settings. As I compared
it with your discussion, I notice it has a constant distance for macro
of about 90 cm.
It appears to be quite sharp and contrasty, and produces *better* photos
than my Tokina ATX 35-70 2.8 ,which has low contrast it seems (compared
from 4 X 6 prints). Does anyone have experience with these lenses?
Gregg
"Paul D. Farrar" wrote:
>
> At 12:46 PM 1/8/00 +0100, Daan wrote:
> >Foxy,
> >
> >>So 200mm internal focus will give about the same as 135mm with extension.
> >>
> >
> >I think that's 150 mm (200 mm micor-N*kk*r) and ~180 mm (C*n*n 200 mm
> >macro), both at 1:2.
>
> The Sigma 180/5.6 shorten to about 120mm.
>
> >I'm not sure about the new micro-N*kk*r-zoom lens and
>
> This one gets really short. It's marked 70-180, but at highest magnification
> (at a marked 180) it is only 4" (100mm) from the subject, making it
> scarcely better than a 50mm macro. The Vivitar Series 1 90-180, on the other
> hand, has a working distance of about 18" at the same magnification. It
> stays very close to marked focal length. That lens is a true marvel: it
> focuses from infinity to very close and has all focal lengths (at their
> marked value) at all distances. You just focus on something, then zoom to
> get the imaage size you want. And it was made in OM mount. Most macro zooms
> have a macro mode that only gives you a single magnification at any distance.
>
> Paul
>
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