Archived posting to the Leica Users Group, 2006/09/26

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Subject: [Leica] Summilux 35/1.372
From: rangefinder at screengang.com (Didier Ludwig)
Date: Tue Sep 26 05:44:11 2006
 
Funny. My new Summilux 35 asph is faster than 1.4. At the f1.4 click 
position, where the blades are still visible through the front, I can 
open the aperture blades slightly more until they disappear. I made 
two testshots, f1.4 resulted in a 1/223 speed, while the more opened 
aperture needed a 1/239 speed only. Roughly calculated this makes a 
f=1.372 lens!
Didier
Replies: Reply from photo.forrest at earthlink.net (Philip Forrest) ([Leica] Summilux 35/1.372)