Archived posting to the Leica Users Group, 1997/11/18

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Subject: Re: M3 + 135/2.8 effective base length ?
From: Lucien_vD <Lucien_vD@compuserve.com>
Date: Tue, 18 Nov 1997 16:36:45 -0500
 
>With regards to focus accuracy and RF baselength --
          =

> Wouldn't using whichever version of the 135/2.8 that had the =

> "goggles" "extend" the baselength, and therefore the focus =

> accuracy?  I have often thought of this because I do use my 135mm =

>(Canon w/M-adapter) a lot on my M3.  I can't say that I'm =

>thrilled with the 35mm goggles on my Summicron, but it's not a =

> lens I use very much.

Camera                                  With 135/2,8 (X1,5)

M3   0,91 X 68,5  =3D 62,3 effective      93,45
MP   idem
M2   0,72 X 68,5  =3D 49,3                73,95
M4   idem
M5   idem
M4-2 idem
M4-P 0,72 X 69,25 =3D 49,9                74,85
M6   idem
M6J  0,85 X 68,85 =3D 58,5                87,75


Lucien
BELGIUM