Archived posting to the Leica Users Group, 2004/05/04

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Subject: [Leica] Two sets of aperture blades?
From: marcusb6 at (marcus)
Date: Tue May 4 15:29:07 2004

My CV 35mm pancake has two sets, but they do not
overlap in a way that cuts the corners to make a more
circular aperture. I don't know the why of it.
--- Karen Nakamura <> wrote:
> OK, am I on drugs or does Leica use two sets of
> aperture blades? It 
> seems on many of my lenses, that looking from the
> front, there is one 
> set (main set?) that closes down, but from the rear,
> there's another 
> set that gradually closes down and catches up at
> f/22 or so. It's 
> very odd.
> Is this to smooth out bokeh? Or am I seeing an
> illusion?
> Karen
> -- 
> Karen Nakamura
> _______________________________________________
> Leica Users Group.
> See for
> more information

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Replies: Reply from Frank.Dernie at (Frank Dernie) ([Leica] Two sets of aperture blades?)
In reply to: Message from mail at (Karen Nakamura) ([Leica] Two sets of aperture blades?)