Archived posting to the Leica Users Group, 1997/09/04
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>
> >I was wonder if you have any more info, or could point me in the direction of
> >any more info regarding the DR Summicron? I sure would be grateful.
> >Thanks!!
>
> Doug-
>
> I happened on that article quite by accident. It seems that other than
> the web pages by Erwin Puts, Hans Palen and Cameraquest, there are few
> sites which offer original content. Has anyone found some other good
> sources?
>
Not a site, but I just tested my '59 DR. I suspect that I
may not have had perfect target alignment, but the lens
is AT LEAST this good;
Resolution, lines/mm, magnification 1:43
Center 5mm 10mm 15mm 20mm
f/2.0 108 96 86 77 77
f/2.8 108 122 122 86 86
f/4.0 136 136 108 86 77
f/5.6 122 108 108 96 86
f/8.0 108 122 108 96 86
f/11 108 122 108 96 86
I would judge contrast and color saturation very good.
There was a slight bit of astigmatism off axis at f/2.0.
No noticeable coma or light falloff. Flare very well
controlled. All in all, a very good performing lens,
and I love the real-world images.
FWIW,
Paul.