[Leica] Leica M lens MTFs

[john at mcmaster.co.nz (John McMaster)]

I think that they admitted that the 35mm f2.5 had an aspheric element but 
did not publicise it. They seem tardy with MTFs currently, there is not one 
for the 100mm S APO yet either.

john

-----Original Message-----


Thanks, that's a good set of data sheets.

My reading of the various postings regarding the new Summarits suggests that 
the 35mm might actually have a new formula, with an aspherical element 
added, but we'll see.

On another forum someone had asked about the 75 2.5 I use with the Sony a7r. 
 I had a copy of the old PDF that I posted for him, but I could not find the 
official ones where I thought they used to be.

I wonder how Leica evaluates its sales into the non-Leica camera base.  The 
WATE and everything above 50 mm is better than anything else on the Sony 
(unless perhaps one has a porter to carry around the new huge Zeiss top end).

Paul
www.PaulRoark.com

On Sun, Oct 26, 2014 at 1:09 PM, Henning Wulff <hjwulff at gmail.com> wrote:

> Forgot to mention: the 'new' f/2.4 Summarits are rumoured to be the 
> same optically as the f/2.5's, but in new mounts. I haven't been able 
> to verify that, but it makes sense as the 2 Summarits I tried were a 
> bit fast for f/2.5's.
>
> Henning
>
>
> On 2014-10-26, at 11:31 AM, Paul Roark <roark.paul at gmail.com> wrote:
>
> > That appears to be old downloads.  There is a new line or Summarits 
> > -
> f/2.4
> > - such as this one:
> >
> >
> http://en.leica-camera.com/Photography/Leica-M/M-Lenses/Summarit-M-75m
> m-f-2.4
> >
> > I'm curious what they've done, like design wise, and whether they 
> > have published new MTFs.
> >
> > Paul
> > www.PaulRoark.com
> >
> > On Sun, Oct 26, 2014 at 10:18 AM, Mark Rabiner 
> > <mark at rabinergroup.com>
> > wrote:
> >
> >>
> >>
> http://leica-camera.pl/wp-content/downloads/Summarit-M_35_mm_Technical
> _Data_
> >> en.pdf
> >>
> >> http://leica-camera.pl/wp-content/downloads/
> >>
> >>
> >> On 10/26/14 12:25 PM, "Paul Roark" <roark.paul at gmail.com> wrote:
> >>
> >>> Is there any source of the MTFs for the new Summarits?  Leica 
> >>> seems to
> >> have
> >>> changed its web pages and eliminated the PDFs I usually found there.
> >>>
> >>> Thanks,
> >>>
> >>> Paul
> >>> www.PaulRoark.com
> >>>