Archived posting to the Leica Users Group, 2001/01/16

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Subject: Re: [Leica] M lens lengths + ASPH 28f2 hood
From: John Collier <jbcollier@home.com>
Date: Tue, 16 Jan 2001 18:02:56 -0700
 
Did you have all your lenses set at infinity?

Only the 28/2 uses the 12451 hood.

John Collier

> From: "Rob Studdert" <audiob@ozemail.com.au>
>
> In the process of measuring the lens length from the mounting flange of my
> M lenses in order to design a case I noticed some interesting variations in
> measurements vs printed specifications (users manuals and advertising
> matter seemed to correlate).
> 
> In particular the:
> 
> Summicron-M 50f2 (11826) measured 46mm spec 43.5mm
> Summilux-M 75f1.4 (11810)  measured 82.5mm spec 80.0mm
> Summicron-M ASPH 90f2 (11884) measured 83.5mm spec 78mm
> 
> These are fairly significant differences, can anyone confirm the length of
> their 
> 75 and 90 for me?
> 
> Also has anybody a clue if the yet-to-be released M ASPH 28f2 will have a
> new dedicated hood or will use one of the existing models?
> 
>