I've compared the f=40cm close up lens on a couple of Zuikos other than the
50mm and the focusing range doesn't seem to change significantly. It's
approximately 45cm @ infinity on the Zuiko 28/2.8 and approximately 55cm @
infinity on the Zuiko 75-150/4. That's particularly interesting because if
the 75-150/4 has a significant flaw it's in its lack of close focusing
ability.
What really changes is magnification. I find myself using the f=40cm close
up lens more often with the 75-150/4 zoom than any other lens. This allows
me to make gross changes in magnification with the zoom ring and fine focus
with the focus ring. At the 150mm focal length the combination gets
approximately 1:2 magnification. Reasonable viewfinder brightness because
the close up lens doesn't affect the f/4 maximum aperture, and very good
resolution with somewhat less contrast than the Zuiko 50/3.5 macro. I've
used this combo quite a bit when shooting petrified wood structures to good
effect. Nicely fuzzes out unwanted backgrounds.
===========
Lex Jenkins
=====================================================================
"It is a mystery wrapped in a riddle shrouded in an enigma powdered
with a paradox with little shiny sprinkles of bemusement on top."
=====================================================================
Date: Fri, 08 Dec 2000 19:45:15 From: "Franklin Berryman"
<faberryman@xxxxxxxxxxx>
Subject: [OM] Olympus Close-Up Lens f=40cm
...a Olympus Close-Up Lens f=40cm...changes the focusing range of a 50mm
f1.8 from 45cm-infinity to 19cm-45cm. Is there a formula I can use to
figure out the effect it will have on the focusing range of other lenses?
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