Looks like the 55/2.8 AIS performs uniformly well upto f/11 according to
the test, while the Zuik 50/2 does not .
If the 55/2.8 is a 'better' lens why then is the Zuik always compared to the
50 'cron and not the micro Nikkor ?
-Tim
----- Original Message -----
From: "tOM Trottier" <Tom@xxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, November 17, 2002 11:39 AM
Subject: Re: [OM] 50mm f2 vs 3.5
> (from http://members.aol.com/olympusom/lenstests/default.htm )
>
> Nikon Micro-Nikkor 55mm f/2.8 AIS (multicoated)
> Nikon F2 with mirror and diaphragm prefire
> Distortion: slight waveform with no tendencies
> Vignetting: A- @ f/2.8, A thereafter
> Aperture Center Corner
> f/2.8 A- B+
> f/4 A A-
> f/5.6 A A-
> f/8 A+ A+
> f/11 A A-
> f/16 B+ A-
> f/22 B B
> f/32 B- B-
> Notes: High contrast at f/2.8 and f/16; very high contrast at f/8 and
> f/11; extremely high contrast at f/5.6; moderately high contrast
> (diffraction limited) at f/22 and f/32. Remarkable image detail at
> f/8 - the optimal aperture.
>
>
> 50mm f/2.0 Zuiko Macro (multi-coated)
> OM-1 with mirror lockup
> 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-
>
> OM-2000 with mirror and aperture prefire, same lens as above
> Aperture Center Corner
> f/2 B- B-
> f/2.8 B- B
> f/4 A- A-
> f/5.6 A- A
> f/8 A+ A+
> f/11 A A-
> f/16 A- B+
> Notes: Moderate contrast at f/2, f/2.8, f/4, f/5.6, f/16, moderately high
> contrast at f/8 to f/11. Paired comparison to the Leitz 50mm f/2
> Summicron-M in the Other Camera Manufacturer's Lenses section, with
> differences significant at the 1/3 grade level.
>
>
> 50mm f/3.5 Zuiko (multi-coated)
> OM-1 with mirror lockup
> Vignetting = B+
> Distortion = none
> Aperture Center Corner
> f/3.5 C+ C-
> f/5.6 A- B+
> f/8 A- A-
> f/11 A- A-
> f/16 B+ B
> f/22 B B-
> Notes: Moderately high contrast image which softens beginning at f/11
> and is distinctly softer at f/22, thus yielding best performance at
> f/8; soft wide open; classic performance curve across aperture range.
>
> OM-4 with mirror and aperture prefire
> Vignetting = A- @ f/3.5, A @ f/5.6
> Distortion = very slight pincushion
> Aperture Center Corner
> f/3.5 B- C
> f/5.6 A A
> f/8 A+ A
> f/11 A A
> f/16 A- A-
> f/22 B+ B+
> Notes: Moderately high contrast, except high at f/8. Different lens
> sample than the OM-1 test above.
>
> tOM
> ...
> ---- Quidquid latine dictum sit altum viditur ----
> ,__@ tOM A. Trottier +1 613 860-6633 fax:231-
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