Archived posting to the Leica Users Group, 1997/10/02

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
Subject: Re: f/stops weird and wonderful
From: Alfred Breull <puma@hannover.sgh-net.de>
Date: Thu, 2 Oct 1997 09:50:26 +0200
 
At 16:57 01.10.1997 -0400, you wrote:

>The other is the Stoltz scale, alias the 'European' scale popularized by
>Leitz.  Here, the numbers run:  1.1-1.5-2.2-3-4.5-6-9-12-18 and so forth.  

 .. 2.2, 3.2, 4.5, 6.3, 9, 12.5, 18, 25 ..., with an additional mark at 
f 2.9 for the Agfacolor filter in the early 30ies.

Alf