Archived posting to the Leica Users Group, 2000/03/02

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Subject: Re: [Leica] M6 50mm frame line verses M2,M4,M4-2 50mm frame line
From: John Collier <jbcollier@home.com>
Date: Thu, 02 Mar 2000 19:55:41 -0700

Forgive me for asking this but could you be confusing the 75 frame with the
50mm? The 50mm lens has focussed to .7 meter since 1969 with version 11817.

John Collier (who deserves to be flamed for such audacity)

> From: john <bosjohn@mediaone.net>
> 
> I was just sitting here fiddling with and M4 and M6, and I noticed, much to my
> surprise, the 50mm frame line in the M6 is smaller than the M4.  I thought to
> myself, self, how odd, so I got out an M2 and M4-2. The M2, M4, M4-2 50mm
> frame lines all seemed to include the same within the frame but the M6
> included noticeably less within the frame line. I double checked by putting
> the cameras on a tripod and setting markers ten feet from the camera ( two
> light stands) to mark the edges of the 50mm frame line for the M4. Replacing
> the M4 with the M6 the frame lines were, as I said noticeable narrower, though
> I did not measure how much. It looked like about three inches or so.
> 
> The only reason I can think of for this oddity is that Leica resized the frame
> to be accurate at the closest focusing distance when the 50mm Summicron
> decided it could focus to 28" instead of 40".
> 
>