Hi Marco:
<< Macro zoom are rare birds, Nikon has just made one, the first and only in
the world, asfaik. >>
Vivitar had a Series 1 macro zoom with a matched multiplier. 90-180mm and
decent enough test results, if I recall correctly.
<< When you have to do repro work you can set the zoom at the lenght of zero
distortion, almost every zoom has one. >>
Hopefully it is the same focal length that the zoom goes into close focusing
ability at!
<< Real zero distortion is found only in macro lenses >>
I just posted test results which refute this for some none macro Zuiko lenses.
The 100 mm f/2.0 is a good example. For those with close focusing aberration
correction, we have the near equivalent of a macro lens. The difference is
that OLY was truthful and didn't claim macro capability for a close focusing
lens.
Gary Reese
Las Vegas, NV
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