Archived posting to the Leica Users Group, 2000/11/06

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Subject: [Leica] Summitar, Elmar, Jupiter
From: "Stanislaw B.A. Stawowy" <watteau@krakow.neurosoft.net>
Date: Mon, 6 Nov 2000 12:00:38 +0100
 
Hello friends!
I recently tested these three lenses:
Coated Summitar 2/50 collapsible
Coated Industar 22 3.5/50 collapsible (is this a Elmar copy?)
Coated Jupiter 3 1.5/50 - Sonnar copy

Results are somewhat strange for me:

At f/2 Jupiter was way ahead of Summitar
At f/4 Industar/Elmar outperformed (wide open!) both
Jupiter and Summitar, Jupiter took second place.
At f/5.6 all lenses performed equally well
At f/8 Summitar was best, Jupiter and Industar were worse,
but still acceptable quality

At similar scale, Jupiter 12 (2.8/35, recent production)
outperformed all these lenses from f/4 up to f/8

Please comment this. I hope both Marc Small and Erwin Puts 
will have something to say about optical qualities of these lenses.


                                St.
                     (Stanislaw B.A. Stawowy)
              http://www.geocities.com/Stanislaw_Stawowy