Archived posting to the Leica Users Group, 2005/05/13

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Subject: [Leica] Summaron eyes
From: ealadner at (Eric Ladner)
Date: Fri May 13 08:52:45 2005
References: <>

I'm a little confused by this. While I can see that the bayonet ring on 
my Summaron f:3.5 might be removable (it appears to be held in place by 
three screws at the bottom of the lens), it would not be much like an 
LTM/M adapter--just the bayonet lugs, without the flange with the lens 
information and red dot--and it would be much thinner, without the 
depth of the threads. And, although the eyes are removable, they are 
completely separate from the lens mount: they slide onto a foot on the 
top of the lens, and are secured by a knurled screw. I haven't looked 
at a DR Summicron in quite a while, but this arrangement is like what I 
remember on them.

Am I talking about a different lens than you are?

--Eric Ladner

On May 12, 2005, at 5:29 PM, John O. Newell wrote:

> If I recall correctly, I think I read somewhere years ago that all of 
> the M3 35mm versions were made in this manner; i.e., a screw-thread 
> lens and a separable set of goggles.  Whether the flange dimensions 
> are such that the lenses are, in fact, ordinary-spec LTM lenses 
> screwed into the adapter I do not recall.
> I saw one of these for sale recently, but it was not cheap.
> John Newell
>> I recently saw a picture of Summaron/M3 eyes, detached from the lens.
>>> From the photo, the bayonet mount looked very similar to an LTM/M
>> adapter. Therefore my question: is it possible to use the
>> eyes to mount any screw mount lens to an M camera, in other words,
>> is this an M39 mount with the correct flange distance ? The idea
>> would be to use it to mount a 24mm lens to an M2, for example.
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In reply to: Message from john.o.newell at (John O. Newell) ([Leica] Summaron eyes)