Archived posting to the Leica Users Group, 1997/12/16

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Subject: Re: [Leica] no. of blades
From: "Arnold Don Abravanel" <arniea@loop.com>
Date: Tue, 16 Dec 1997 20:25:56 -0800
 
Does the amount of blades in a lens add or detract to value or operation of
a lens??

- ----------
> From: Alfred Breull <puma@hannover.sgh-net.de>
> To: leica-users@mejac.palo-alto.ca.us
> Subject: Re: [Leica] no. of blades
> Date: Saturday, December 13, 1997 3:33 AM
> 
> At 16:55 06.12.1997 +0800, Leslie Tseng wrote:
> >Please help me with these questions:
> >(1) Which Leica M/LTM lens has the largest number of blades 
> >    (to form the diaphragm)?
> >(2) Which RF/VF lens has more blades than Leica lenses?
> 
> I counted the (visible) blades of some of my lenses:
> 
> N of
> blades         lens
> 
> 12             2/50 Summar 1935, 1937
> 10             2/50 Summitar 1939, 1950
> 10             2/50 Summicron 1953, 1954, 1962 (coll LTM & M, rig M)
> 15             1.5/50 Summarit 1953 (LTM) 
> 15             1.9/73 Hektor 1933
> 9              1.4/35 asph Summilux 1997
> 5              4.5/38 Biogon :) 1961
> 
> Hope it helps.
>