[Leica] Differences between f1.4 and f2 Summicron 35mm ASPH lenses?

[leica at screengang.com (Didier Ludwig)]

Agree for bigger and heavier, even if the 35/1.4 ASPH is still 
rangefinder-like in size, unlike the 75 Summilux. See the specs gere:

Summilux:
<http://www.leica-camera.us/assets/file/download.php?filename=file_129.pdf>
Summicron:
<http://www.leica-camera.us/assets/file/download.php?filename=file_105.pdf>

The Summilux performs at 1.4 like the Summicron at f2 - Don, you'll have a 
hard time to run your Summicron at f1.4 :-)

Didier


>Vick,
>Yes, the new design in the ASPH line allows the 1.4 to be as good as
>the 2.0 version at 1.4.  
>More money, bigger heavier lens, but very much the same optical
>performance.
>Don
>
>
>
>>Hello,
>>Can some tell me about the f1.4 and f2 Summicron 35mm ASPH lenses?  Is the
>>f1.4 the available darkness extension of the f2, e.g. for more money, the
>>f1.4 is the same performer from f2 to f16 but one gets the f1.4 opening,
>>and the f1.4 is larger/longer than the f2?
>>....Vick