Here is a lens test on a well regarded lens that has been discussed more than
a few times over the last few weeks. It has remarkably even performance
through its aperture range (as previously shown in its Popular Photography
lens test) and acquits itself well again the 90mm f/2 Zuiko Macro.
100mm f/2 Zuiko (multi-coated)
Vignetting = A
Distortion = None
Aperture Center Corner
f/2 C+ C+
f/2.8 B- B-
f/4 B B
f/5.6 B+ B
f/8 A- A-
f/11 A A
f/16 A+ A
f/22 A- A-
Note: Exceptional low contrast image detail stopped down; remarkable lack of
vignetting wide open. One of the best Zuiko lenses.
I found it remarkable that performance would peak out of f/16, since once
would expect diffraction limited performance at that aperture.
Gary Reese
Las Vegas, NV
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