Glückwunsch Henry, es soll etwas schlechter sein als das Olympus 2/90
90mm f/2.0 Zuiko Macro (multi-coated):
OM-2000 with mirror and aperture prefire
Vignetting = C+ @ f/2, B at f/2.8, B @ f/4, A- thereafter
Distortion = none
Aperture Center Corner
f/2 B+ A-
f/2.8 A- B+
f/4 B+ B
f/5.6 A- B+
f/8 A- A-
f/11 A- B+
f/16 A- B-
f/22 A- B-
Notes: Moderately high contrast images at f/22; high contrast images at
f/2, f/2.8 and f/16; very high contrast images at f/4, f/5.6 and f/11;
extremely high contrast images at f/8. Paired SQF grade and contrast
comparisons to the Leitz 90mm f/2 Summicron-R test done on a Leicaflex,
with SQF differences significant at the 1/3 grade level.
Condition: 9+ (KEH=Ex+).
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Leitz 90mm f/2 Summicron-R (1978 era 3-cam)
Leicaflex with mirror and diaphragm prefire
Vignetting = B @ f/2, A- @ f/2.8, A thereafter
Distortion = slight pincushion
Aperture Center Corner
f/2* C+ C
f/2 B B
f/2.8 B+ B
f/4 B+ A-
f/5.6 A A
f/8 A- A-
f/11 A A
f/16 A B
Notes: * = Tested with a B+W 010 filter. Moderately high contrast images
at f/2; high contrast images at f/2.8 and f/16; very high contrast at
f/4 and f/11; extremely high contrast images at f/5.6 and f/8. Lens
condition 9+ (KEH=Ex+). Paired SQF grade and contrast comparison to the
90mm f/2 Zuiko Macro test done on a OM-2000, with SQF differences
significant at the 1/3 grade level.



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