Archived posting to the Leica Users Group, 2000/11/29

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Subject: Re: [Leica] Jupiter 3, 50mm f1.5, on Leica IIIa
From: "A.H.SCHMIDT" <horsts@primus.com.au>
Date: Thu, 30 Nov 2000 00:27:54 +1100
References: <034801c059f3$5e895f40$4d02a8c0@neurosoft.lan>

Stanislaw B.A. Stawowy wrote:

> > I purchased a Jupiter 3 for use on my Leica IIIa and found it would not
> > screw down all the way.
> > I tested the lens on a Leica IIIc and a Leica IIIf and found it mounted
> > properly on both.   My Jupiter 9 works fine on the IIIa.
> > Is there something different about the IIIa threads compared to the IIIc and
> > the IIIf?
>
> As far as I recall, older Leica threads were 1/25 inch, later were 1 mm,
> as were Russian Leica copies.
>
> Marc, please correct me if I am wrong.. :-)
>

The pitch for Leica screw mount lenses was always 0.977mm.

Regards, Horst Schmidt

In reply to: Message from "Stanislaw B.A. Stawowy" <watteau@krakow.neurosoft.net> (Re: [Leica] Jupiter 3, 50mm f1.5, on Leica IIIa)