[Leica] Two sets of aperture blades?

[marcusb6 at yahoo.com (marcus)]

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.
-Marcus
--- Karen Nakamura <mail@gpsy.com> 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
> http://www.photoethnography.com/ClassicCameras/
> _______________________________________________
> Leica Users Group.
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