Archived posting to the Leica Users Group, 2000/08/05

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Subject: Re: [Leica] "notoriously crappy" lens
From: "Henning J. Wulff" <>
Date: Sat, 5 Aug 2000 12:52:26 -0700

At 12:45 PM -0400 8/5/00, wrote:
>In a message dated 8/5/00 12:25:41 PM Eastern Daylight Time,
> writes:
><< From that point on there was
> more progress in contrast (a function of coating techology) than sharpness
> design function). >>
>That sounds about right.  Where would composition of the glass and
>manufacturing of glass and body fit into the equation?  Any experts listening?

By 'sharpness' I suppose you mean resolution? It's true that resolution is
largely independent of coating technology, but contrast is also definitely
a design function, meaning that it is dependent on choices of refractive
indices and geometries of lenses. Even flare levels are dependent on design
funtions as well as coating technology.

   *            Henning J. Wulff
  /|\      Wulff Photography & Design
 |[ ]|