Archived posting to the Leica Users Group, 2003/07/13
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At 6:49 PM -0400 7/12/03, Marc James Small wrote:
>At 03:05 PM 7/12/03 -0700, you wrote:
>>Hi Marc;
>>Would you happen to know if the rear element of the 135 Elmar is
>asymmetrical?
>
>I am absolutely convinced that it is not asymmetrical, as Leita made so
>much of the assymetrical element in the original 1.2/50 Noctilux. As Leitz
>never claimed any assymetric qualities for the 4/135 Elmar -- or Tele-Elmar
>-- they probably didn't have such.
>
>Marc
Are you guys talking about asymmetry or asphericity? Almost every
lens has elements that are asymmetrical; ie, elements that have
different curvature radii on the front and back surfaces. (Axial
asymmetry only applies to Anamorphic lenses.)
Aspherical elements (for which the Noctilux f/1.2 became famous) is a
different matter. No Leica 135 has or had these, AFAIK.
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* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@archiphoto.com
|[ ]| http://www.archiphoto.com
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