Archived posting to the Leica Users Group, 2008/05/03

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Subject: [Leica] Update: My Noctilux back from world travels. Looks tan andhappy!
From: editor at frontenachouse.com (editor@frontenachouse.com)
Date: Sat May 3 09:32:19 2008
References: <82c9dd70805030828i1dc1756dp37f3c692ec5cb5c4@mail.gmail.com>

Would love to see some f1 images.  D.Scollard
----- Original Message ----- 
From: "Eric Korenman" <faneuil@gmail.com>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Saturday, May 03, 2008 9:28 AM
Subject: [Leica] Update: My Noctilux back from world travels. Looks tan 
andhappy!


> My noctilux just got back from Germany.
> It now has a spiffy 6 bit code ring to prove it.
>
> results: Absolutely spot-on focus at f 1.0 on my M8
> higher apertures still result in drifting back focus (but I didn't
> expect them to regrind the lenses..)
>
> so I am happy.
> Whatever they did (likely the shimming by the 6 bit code ring) helped.
> No more hex key monkeying with the M8's cam for me.
>
> Eric
>
> On Sun, Apr 20, 2008 at 10:58 AM, Eric Korenman <faneuil@gmail.com> wrote:
>> My noct is coming back from Germany this week. Wish me luck.
>>  Leica claimed that adding the 6 bit coding ring would 'shim' it
>>  slightly and improve focusing with my m8.
>>
>>  here's to sharp eyes and soft ears,
>>  Eric
>>
>>
>>
>>  On Sun, Apr 20, 2008 at 10:31 AM, Leonard Taupier <len-1@comcast.net> 
>> wrote:
>>  > Hi Steve,
>>  >
>>  >  Don didn't ask for my M8, just the lenses. He still has them and I 
>> would
>>  > expect for awhile as he's pretty busy.  Others on the Camera forum 
>> have done
>>  > the same thing and report very good results.
>>  >
>>  >  Len
>>  >
>>  >
>>  >
>>  >
>>  >  On Apr 20, 2008, at 10:15 AM, Steve Barbour wrote:
>>  >
>>  >
>>  > >
>>  > > On Apr 20, 2008, at 6:46 AM, Leonard Taupier wrote:
>>  > >
>>  > >
>>  > > > This is a very interesting issue. I don't know if anybody has 
>> mentioned
>>  > what happens to the depth of field of the Noctilux, or any other lens, 
>> in a
>>  > Leica film camera versus the M8 digital camera. It seems that nobody
>>  > complains about the focus on a film body but all kinds of complaints 
>> on the
>>  > M8, especially the Noctilux, Summilux Asph and the 75mm Summilux. Is 
>> there a
>>  > difference? Yup, there sure is. I tested 16 leica lenses for depth of 
>> field
>>  > at a distance of 8 feet. I tested 13 of the lenses with film using a 
>> .85 MP
>>  > and compared the results to those taken with an M8 and a 1.25 Leica
>>  > magnifier.
>>  > > >
>>  > > > In every case the DOF shifts away from the camera with the M8. In 
>> other
>>  > words the lens appears to back focus. The worse lens for this shift is 
>> the
>>  > Noctilux. But even on a film camera it is barely in focus. The typical 
>> back
>>  > focus shift of any 50mm Leica lens is about 4 to 5 inches at 8 feet 
>> with the
>>  > M8. The backward shift of the Noctilux is between 8 and 9 inches. This 
>> puts
>>  > the focused point of the rangefinder outside the depth of field of the 
>> lens.
>>  > The other thing I noticed is the DOF is better centered on the older 
>> LTM
>>  > lenses then on the newer lenses. I don't know if this is a quality 
>> control
>>  > problem now or if the focus point test has changed. I tested 7 LTM 
>> lenses,
>>  > the Xenon, Summarit, Summitar, Summicron Coll, 50 Elmar RS, 90 Elmar 
>> and 135
>>  > Hektor. The focus point nicely stayed within the DOF on both cameras. 
>> Of the
>>  > M lenses the best is the 1st 50mm Summicron rigid version followed by 
>> the
>>  > current 50mm Summicron.
>>  > > >
>>  > > > I verified my results with a second M8. The MP body is one year 
>> old and
>>  > purchased new. I also sent my Noctilux and 75mm Summilux to DAG for 
>> focus
>>  > adjustment even though the lens is still in warranty. I'm also 
>> shooting more
>>  > with film these days.
>>  > > >
>>  > >
>>  > > hi Len,
>>  > >
>>  > > is it appropriate to send a Noctilux to DAG for focus adjustment, 
>> without
>>  > the body...
>>  > >
>>  > > does that work out OK?
>>  > >
>>  > > I agree that with film (bodies) I did fine with the Noctilux wide 
>> open,
>>  > with the M8 much less so...
>>  > >
>>  > > Steve
>>  > >
>>  > >
>>  > >
>>  > > >
>>  > > >
>>  > > > Len
>>  > > >
>>  > > >
>>  > > >
>>  > > > _______________________________________________
>>  > > > Leica Users Group.
>>  > > > See http://leica-users.org/mailman/listinfo/lug for more 
>> information
>>  > > >
>>  > >
>>  > > best, Steve
>>  > >
>>  > >
>>  > > "I never wanted to be famous"
>>  > > http://www.blurb.com/bookstore/detail/186890
>>  > >
>>  > >
>>  > > _______________________________________________
>>  > > 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
>>  >
>>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information 


Replies: Reply from faneuil at gmail.com (Eric Korenman) ([Leica] Update: My Noctilux back from world travels. Looks tan andhappy!)
In reply to: Message from faneuil at gmail.com (Eric Korenman) ([Leica] Update: My Noctilux back from world travels. Looks tan and happy!)