Archived posting to the Leica Users Group, 2012/01/16

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Subject: [Leica] Summicron DR Eyes
From: csaganich at gmail.com (Chris Saganich)
Date: Mon, 16 Jan 2012 19:33:21 -0500
References: <CAN4TZQ4GWRT1pwA4dTo6WV4UU1x4CavjnbwZjRGy_Vhb6hvfZw@mail.gmail.com> <b3ad95ef8b96c73d6a0eb62ffd1813f0@mail.gmail.com>

Jim, perfect song for the PBS Special.

On Mon, Jan 16, 2012 at 6:44 PM, Jim Shulman <jshulman at 
judgecrater.com>wrote:

> http://www.youtube.com/watch?v=RwUQwVs87eM
>
>
> -----Original Message-----
> From: lug-bounces+jshulman=judgecrater.com at leica-users.org
> [mailto:lug-bounces+jshulman=judgecrater.com at leica-users.org] On Behalf 
> Of
> Chris Saganich
> Sent: Monday, January 16, 2012 6:25 PM
> To: Leica Users Group
> Subject: [Leica] Summicron DR Eyes
>
> I noticed that according to Steve Gandy's lens guide the eyes of my DR
> shouldn't be compatible with the lens body.  The newer DR lenses have a
> dual scale in feet and meters, focus to 20in, and have ridges in the
> trough
> of the focus ring knurling.  The older DR bodies have a single scale,
> focus
> to 19in, have reproduction ratios, and have ridges on the peaks of the
> focus ring knurling.  The older bodies are supposed to have a larger ball
> bearing compared to the newer DR bodies making the newer eyes incompatible
> to the older DR bodies, but the older eyes will work on the newer DR
> bodies.  Older eyes have the "condenser" logo and newer eyes have the
> Leitz
> Wetzlar logo.  According to convention ( which I haven't confirmed) the
> newer eyes shouldn't be compatable on the older DR bodies due to the ball
> bearing size difference.  My DR has the new logo and the older body so I
> was curious if I could find any other examples of this anomaly.  I
> searched
> ebay and the internet for examples where the age of the lens and logo of
> eyes were identifiable.  Here is what I found:
>
> 1956- 125,594 lenses made
> 1402xxx Old Body Old Logo
> 1403731 Old Body Old Logo
> 1440268 Old Body New Logo
>
> 1957- 89,389 lenses made
> 1487412 Old Body New Logo
> 1513415 Old Body New Logo
> 15301xx Old Body New Logo
> 1534320 Old Body New Logo
> 1545576 Old Body New Logo
>
> 1958 -97,281 lenses made
> 1587819 Old Body Old Logo -From Cameraquest website
> 1592570 Old Body New Logo - My Lens
> 1623068 New Body New Logo
>
>
> The only exception is from Cameraquest where Steve probably used an old
> example of the eyes for the old body. Who but Steve would have lots of
> these hanging around?
>
> All this suggests that eyes with the newer logo were manufactured with the
> larger ball bearing receptor for the older DR bodies.
>
> The ball bearing size on my older DR body is 3 mm diameter and 1.8mm
> height. The receptor dimensions on my eyes with newer logo are 3.5 mm
> diameter  and 1 mm deep.
>
> It would be interesting if we could fill in these blanks regarding ball
> bearing measurements on the older and newer DR bodies and eyes:
>
> 1)  Older DR body: 3mm dia x 1.8mm height
> 2)  Eyes with older Logo: ???
> 3)  Eyes with new Logo on older body: 3.5mm dia x 1mm depth
> 4)  Newer DR body: ???
> 5)  Eyes with new Logo on New DR body:  ???
>
> The supposition is that the dimensions of1,  2 and 3 should be similar
> while 4 and 5 should be different and smaller.
>
> --
> Chris Saganich
> www.imagebrooklyn.com
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>



-- 
Chris Saganich
www.imagebrooklyn.com


In reply to: Message from csaganich at gmail.com (Chris Saganich) ([Leica] Summicron DR Eyes)
Message from jshulman at judgecrater.com (Jim Shulman) ([Leica] Summicron DR Eyes)