Gary;
Thanks for these tests, and I look forward to lesson 2.
Now, I can only comment on the 3 lenses I've left below. You may recall
I did some infinity star field tests at wide open and 1 stop down on
these 3 and others. I found the 50/2 macro to be far superior to the
other 2, especially wide open, with the 85 showing a bit of chromatic
abberation and the 35 showing coma, both when wide open only.
Course, I was evaluating point sources through an 8x loupe, not a
complex topo map. But, just wanted to add these reference points.
George
PCACala@xxxxxxx wrote:
>
> Hi all:
>
> For those of you who like lens tests, here is Part 1 of my tests on Zuikos in
<SNIP>
> performance of a 50mm f/2.0 Zuiko Macro at f/8.
> * Evaluations at 24X projection through a Rollei-Vario-Projar 70-120mm lens at
> ca. 100 mm focal length
> * Vignetting grades determined at full aperture: A = none apparent, tending
> towards D = more and more pronounced, with D = unacceptable.
>
> 50mm f/2.0 Zuiko Macro
> Vignetting = B
> Distortion = None
> Aperture Center Corner
> f/2 C C
> f/2.8 C B-
> f/4 B B
> f/5.6 A A-
> f/8 A+ A+
> f/11 A A
> f/16 A A-
> (very contrasty with high resolution)
>
> 85mm f/2.0 Zuiko, single coated
> Vignetting = A
> Distortion = none
> Aperture Center Corner
> f/2 D C
> f/2.8 B B
> f/4 B B-
> f/5.6 B B-
> f/8 B+ A-
> f/11 A- B+
> f/16 A- A-
> (moderate contrast)
>
> 35mm f/2.0 Zuiko
> Vignetting = C
> Distortion = slight barrel
> Aperture Center Corner
> f/2.0 B- C+
> f/2.8 B C+
> f/4 B+ B
> f/5.6 B+ B+
> f/8 A- B+
> f/11 A A-
> f/16 A A-
> (contrasty)
>
> The sleeper lens here is the 35-105mm zoom! But remember that "mileage may
> vary." The fixed focal length lenses in this round of testing have been
> through wars, so they may just test poorer than pampered examples.
>
> Gary Reese
> Las Vegas, NV
>
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