Re: [Leica] an objective evaluation of leica M lenses

["Harold Gess" <gess@icon.co.za>]

Greetings

I found these results interesting, however......

With respect, the problem with such tests is that they mean very little when
assessing a lens. For example a Noctilux, designed for low-light receives a
"weak" rating at F1.0, however it works wonderfully at F1.0 under the
conditions for which it is designed.

These tests always remind me of a car magazine which rated the Land Rover
Defender 90 and Porsche Boxter as poor overall. The trouble is the magazine
surveys vehicles using categories such as "boot/trunk space, suitability for
daily commuting, fuel efficiency at various speeds, etc".

Such testing is usually fine when testing fairly standard items against one
another, but means very little in a vacuum and even less when applied to
speciality items designed with a particular purpose in mind.

Thank you

Harold

- -----Original Message-----
From: Dominique PELLISSIER <pelliss@droit-eco.u-nancy.fr>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: 16 April, 1998 9:47 PM
Subject: [Leica] an objective evaluation of leica M lenses

>Here is a cvs file with the evaluation, after MTF test, of all leica M
lenses. The test has been made by the french review "Chasseur d'images" who
uses its own material (Ealing Eros 200 system five).
>Meaning of letters : W=weak, F= fair,G= good, VG = very good, EX =
excellent.
>The left letter is for the center, the right for the edges.
>
- ----------------------------------------------------------------------
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- -----Original Message-----
From: Dominique PELLISSIER <pelliss@droit-eco.u-nancy.fr>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: 16 April, 1998 9:47 PM
Subject: [Leica] an objective evaluation of leica M lenses


>Here is a cvs file with the evaluation, after MTF test, of all leica M
lenses. The test has been made by the french review "Chasseur d'images" who
uses its own material (Ealing Eros 200 system five).
>Meaning of letters : W=weak, F= fair,G= good, VG = very good, EX =
excellent.
>The left letter is for the center, the right for the edges.
>