Archived posting to the Leica Users Group, 2002/05/31

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Subject: [Leica] <no subject>
From: "dante@umich.edu" <dante@umich.edu>
Date: Fri, 31 May 2002 08:56:33 -0400

If you suffer from the idea that your lenses are misfocusing due to a body
focus problem (for example Noctilux, and Summilux 75), you might check out

http://www.dantestella.com/technical/flange.html

When you do the math, you will discover that it is almost an impossibility
that given the manufacturing specs of any M body, that the problem would be
the body focus of the body (whether Cosina, Leica or Konica, even given
their differing factory specs).

Part 1 http://www.dantestella.com/technical/flange.html#dof

addresses general issues of depth of focus and depth of field

Part 2 http://www.dantestella.com/technical/flange.html#hexar and
Part 3 http://www.dantestella.com/technical/flange.html#keppler

addresses the interaction between the Hexar RF body focus spec and potential
errors you can make in testing Hexar compatibility with Leica, Cosina and
other lenses.

Part 4 http://www.dantestella.com/technical/flange.html#summilux

addresses the fallacy of the Summilux (it's the body's fault/lens's fault,
etc) and the unnecessary work Leica and other rangefinder users have done on
their cameras (body focus adjustments), when they should be concentrating on
rangefinder alignment and more importantly, human factors.

Regards
- ------------
Dante Stella
http://www.dantestella.com

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