Archived posting to the Leica Users Group, 2012/10/11

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Subject: [Leica] turn around time for coding lens for digital M's
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Fri, 12 Oct 2012 14:00:28 +1000
References: <20599.17411.591734.750669@gargle.gargle.HOWL> <CAJ3Pgh6oy+qWndG1-22sNW3uaKR+jeqs6YO-vmK6+K=nsrRAcQ@mail.gmail.com> <80F9701439F20347874CE5E4E03C22E998AC030C@WhizzMAIL01.whizz.org> <CABmfTOUK7xoFwupwNg0q3G-CyV3XcocYQRwmYjuxs8mB9wS3BA@mail.gmail.com> <80F9701439F20347874CE5E4E03C22E998AC1EB6@WhizzMAIL01.whizz.org> <3DC41EC801A84ABCB4F1965755DC59FC@syneticfeba505> <CABmfTOWo8=WqZ6DqqubUVAe8f=x8rCKTORMXRZSJDrpycZhQSw@mail.gmail.com> <13C6AC51-95B9-4B99-8392-486639E48A2D@gmail.com> <80F9701439F20347874CE5E4E03C22E998AC3794@WhizzMAIL01.whizz.org> <FD997D59-7164-42C9-8641-53FD47457423@gmail.com>

Steve don't forget that these fast lens designs do focus shift as you stop
down. The newer designs do that much less so (for example the new Summilux
35 ASPH).
Spot on wide open in close is quite an achievement in the first place. You
guys are better than I to make that work reliably with the (previous)
Noctii and/or the Summilux 75!
But the sharpest plane will shift somewhat as you stop down until
increasing DoF masks the error.
 As Marty pointed out their calibration systems for the rangefinder and the
sensor positioning within the body and the lenses (with interferometer
measurement) all came about due to the much less tolerant nature of sensors
over film.
Nevertheless even if a lens and body are perfect on delivery it is possible
for for them to loosen/wear in use. My 50 now has twice.


Cheers,
Geoff
http://www.pbase.com/hoppyman



On 12 October 2012 13:38, Steve Barbour <steve.barbour at gmail.com> wrote:

>
> On Oct 11, 2012, at 8:31 PM, John McMaster <john at mcmaster.co.nz> wrote:
>
> > Oh yes, my M9 went to Solms for rangefinder calibration with the lenses
> but did not come back perfect, that was done in NZ
>
>
>
>
> so Noctilux perfect at f1, and the M9 body was still OK at other Noctilux
> f stops, and with other lenses?
>
> >
> > john
> >
> > -----Original Message-----
> >
> > Mine went to Solms, Noctilux back-focussed ~30cm at 5m (and did not
> focus beyond ~50m) and that and 75mm Summilux were 6-bitted. Noctilux came
> back much better but not perfect, made perfect on M9 in NZ. Summilux came
> back back-focussing badly, sent to Solms again and still not quite right on
> either camera :-(
> >
> > I am not sure how the Noctilux can only focus well on M9 but a 50mm
> Summilux asph works wide open on either?
> >
> > john
> >
> > -----Original Message-----
> >
> > On Oct 11, 2012, at 8:19 PM, Marty Deveney <benedenia at gmail.com> 
> > wrote:
> >
> >> Sorry Ted, I disagree, at least if you want photos that are in focus.
> >> My M8, M9 and MM focused so far out with my Noctilux and 75 Summilux
> >> before they were properly calibrated that all my photos were just
> >> fuzz.
> >>
> >> Marty
> >
> >
> > hi Marty,
> >
> > how (specifically) were they calibrated?  What was sent, and to where?
> What information and requests were given and to whom?
> >
> >
> >
> > thanks, Steve
> >
> >
> >
> >>
> >>
> >> On Fri, Oct 12, 2012 at 12:54 PM,  <tedgrant at shaw.ca> wrote:
> >>> SEE ALL THIS STUFF AND IT'S SUPPOSED TO MAKE THEM BETTER??????? :-)
> >>> Look below.
> >>>
> >>>
> >>>>>>> And even then there may be two or more attempts to calibrate them
> >>>>>>> :-(
> >>>>
> >>>>> john
> >>>
> >>>
> >>> -----Original Message-----
> >>>>>
> >>>>> Depending on your lenses they may need a CLA and/or calibration for
> >>>>> the digital Ms, f1.0 Noctilux and 75mm Summilux particularly...
> >>>>
> >>>>
> >>>> If your fast M lenses were made before 2006 and have not been
> >>>> adjusted using the post-digital method, that "may" should read
> >>>> "must" if you want to be able to focus to the maximum accuracy the
> >>>> system is capable of attaining.<<<<<<<<<<<<<<<
> >>>
> >>>
> >>> OH CRAP! :-)
> >>>
> >>> Like I said ..... Click them on and shoot!  If you see something way
> >>> out of line or screwed-up quite badly indicating a real major
> >>> problem???  Then get it fixed!
> >>>
> >>> Until then, it's nothing more than another money maker for Leica and
> >>> screwing us!
> >>>
> >>> And yes I've used a Noctilux f 1.0 since the first one was available
> >>> in Canada around 1970 something? Or close to that. Actually I have
> >>> the first one sold in Canada, made in Canada! Dang and it still works
> >>> like a dream when I need it at f1.0! Just gotta love it! Oh and
> >>> markings??????? What were we talking about????? :-)
> >>>
> >>> cheers,
> >>> Dr. ted :-)
> >>>
> >
> > _______________________________________________
> > 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
>


In reply to: Message from hartzell at alerce.com (George Hartzell) ([Leica] turn around time for coding lens for digital M's)
Message from roark.paul at gmail.com (Paul Roark) ([Leica] turn around time for coding lens for digital M's)
Message from john at mcmaster.co.nz (John McMaster) ([Leica] turn around time for coding lens for digital M's)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] turn around time for coding lens for digital M's)
Message from john at mcmaster.co.nz (John McMaster) ([Leica] turn around time for coding lens for digital M's)
Message from tedgrant at shaw.ca (tedgrant at shaw.ca) ([Leica] turn around time for coding lens for digital M's)
Message from benedenia at gmail.com (Marty Deveney) ([Leica] turn around time for coding lens for digital M's)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] turn around time for coding lens for digital M's)
Message from john at mcmaster.co.nz (John McMaster) ([Leica] turn around time for coding lens for digital M's)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] turn around time for coding lens for digital M's)