Archived posting to the Leica Users Group, 2017/01/13

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Subject: [Leica] 90 Summicron (Canada): still front-focussing!
From: sonc.hegr at gmail.com (Sonny Carter)
Date: Fri, 13 Jan 2017 23:47:58 -0600
References: <CAFT=JcBvYkWwmDGaGKX67=8pEGnpXLD-wd0_TnkmQBDgtCvJ2Q@mail.gmail.com>

Bet it would make beautiful images on a Sony A7rII . . .

from my iPad

Sonny Carter

> On Jan 13, 2017, at 10:58 PM, Peter Cheyne <peter.cheyne at gmail.com> 
> wrote:
> 
> I told Sherry, and said I mainly use an M9. I omitted to tell her I also
> use an M3. Maybe I should have said. Her reply is:
> 
> "Not me.  I am strictly film.  Sorry.  Best regards, Sherry"
> 
> 
> So, Don G says no, send to Leica. Sherry K basically says she won't touch a
> lens that will be mainly used on digital. Leica Japan say they can't
> correct it because they don't have the parts, and they report that Leica
> Germany say the same thing. Kindermann Canada (LightPro Group), on behalf
> of Gerry Smith, said:
> 
> 
> ". . . we would need the camera and lens to test. If the coupling on both
> the camera and lens are correct, then I don't think Gerry can help. We
> adjust the lenses to the factory standard on the Leitz equipment for the
> standards of the film era. The critical testing and adjustment adjustment
> for digital use is only possible with the aid of computerized optical
> adjustment and MTF calibration. Such equipment, and the skill to use it, I
> think is only existing at the factory in Wetzlar. We have had issues
> similar to this and sent lenses to Leica NJ, and they ended sending them to
> Germany."
> 
> 
> My hands are in the air. Now it's looking like Gerry at Kindermann might be
> my only option, and the person at Kindermann who wrote me that recent
> message seems quite unconfident about their facilities being able to
> correct the lens to M9 standards.
> 
> 
> As Spencer says, it looks like a Catch 22, with Leica not having parts, but
> having the machinery, and vice versa with Gerry at Kindermann. I think this
> looks like my best way now is to call Gerry at Kindermann and tell him I
> can send him my M9 with the lens, so that he can use the camera itself for
> further tests, to tweak focus after the Leitz film era equipment has given
> its results.
> 
> 
> Still hoping to repair this lens, as I think gives some beautiful results!
> 
> 
> Peter
> 
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In reply to: Message from peter.cheyne at gmail.com (Peter Cheyne) ([Leica] 90 Summicron (Canada): still front-focussing!)