Archived posting to the Leica Users Group, 1998/12/01

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Subject: Re: [Leica] Accuracy of x.72 range finder
From: (Nigel B Watson)
Date: Tue, 01 Dec 1998 12:57:58 EST

Nonsense.  The only place where DOF is that shallowl is macro.  Although
the M6HM 0,85 finder has been hyped and heralded for its increased
accuracy with the longer and fast lenses (of which the 75 is somewhat of
both), that lens went into production in 1980, which was 14 years prior
to even the M6J.  I do not believe Leica would have made and sold all
those 75's, Noctiluxes and Tele-Elmars (without some "goggles"-type
affair such as the 135/2.8) had the 0,72 been unable to focus these
lenses sharply.
To me, the 75 Summilux, even though it is a magnificently sharp lens (I
tested one Sunday last), doesn't appeal to me because of size and weight,
nothing to do with focussing accuracy.  One reason I appreciate the Leica
is for its compactness, and the 75 is a large, heavy "SLR-sized" lens.  I
don't find that for the size difference, the 75/1.4 gives much advantage
over a 50/1.4 (although in the case of Leica, the 50/1.4 is not as
well-corrected).  I also must add that I *rarely* do portraiture and even
rarer in poor light.  If I did, and therefore needed a large, heavy,
super-fast lens, it would be the Noctilux which has a full 2-stop
advantage over the Summicrons...this said with deference to the 75's
equally impressive performane stopped-down, which I have heard is not a
trait the Noctilux shares.


On Tue, 1 Dec 1998 16:12:49 +0100 (MET) Peter Niessen <>

 He states that the depth of field
>for the 75mm Summilux is 6mm at 2m distance. Is that really true

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