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

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Subject: Re: [Leica] M6 50mm frame line verses M2,M4,M4-2 50mm frame line: humble apology
From: John Collier <jbcollier@home.com>
Date: Fri, 03 Mar 2000 07:26:47 -0700

Boss John.

I was just expecting my computer to be a melted smouldering ruin when I
awoke this morning. You are a scholar and a gentleman. Please feel free to
cast aspersions on my parental lineage, intellectual capabilities or any
other of my many and varied flaws.

John Collier

> From: john <bosjohn@mediaone.net>
> 
> John Collier wrote:
>> 
>> 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".
>>> 
>>> 
> I am pretty far gon, but no, I didn't mistake the 75mm frameline for the 50mm.
> Bosjohn