Archived posting to the Leica Users Group, 2001/06/06

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Subject: [Leica] RE: Re: Hexar Back focus
From: Jim Brick <jim_brick@agilent.com>
Date: Wed, 06 Jun 2001 08:24:15 -0700

I think I'll go check out the Cosina-Voigtlander list for some Leica chatter...

Jim


At 07:14 AM 6/6/01 -0700, you wrote:
>In his original message Erwin did say "a bandwidth of .06mm".  This to me 
>implies "+/-.03mm" as bandwidth is usually interpreted as the maximum range 
>of the signal on both sides of the 0 line.  So that means that Leica has a 
>tolerance of +/-.02mm, and the Hexar has a tolerance of +/-.03mm - not 
>nearly as bad a result as Erwin implies in his subsequent statement "Leica 
>tolerances are 3 times as narrow as the Konica ones (0.02 versus 0.06)".
>
>Erwin's apparent misstatement aside, it does leave the nagging question of 
>the nominal back focus in each case - the Leica's 27.8 and the Hexar's 28.0.
>
>Paul
>
>-----Original Message-----
>From: Cummer Family [mailto:cummer@asiaonline.net]
>Subject: [Leica] Re: Hexar Back focus
>
>I asked Mr. Leung to look at the Hexar service manual and read with my own
>eyes that the back focus is 28mm +/- 0.03mm - not the 0.06mm which Erwin
>reported on May 9 2001 to the LUG: