Archived posting to the Leica Users Group, 1996/11/28

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Subject: Re: Number of Blades
From: Dan Cardish <dcardish@spherenet.com>
Date: Thu, 28 Nov 1996 15:35:16 -0400

At 11:05 AM 28/11/96 -0700, Chris wrote:
>LUGers,
>
>I have noticed that, that over the years, there has been a reduction in the
>number of blades. An extreme example is the relatively new 50mm/2.8 Elmarit,
>which only has six blades. The most recent 50mm Summicron has eight blades,
>while the DR Summicron  and type-2 Summicron each had ten blades. What is
>going on?
>
>I noticed this recently, after taking pictures on a particularly gray day. A
>car's headlamps produced an eight-fold pattern in the print. I agree that an
>eight-fold pattern appears more natural than a 10-fold pattern, but this
>still leaves me unsatisfied. Can one of you shed some light on this phenomenon?
>

My 50 summilux has 12 blades; all my other lenses have 10.

Dan C.