Archived posting to the Leica Users Group, 2002/04/26

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Subject: Re: [Leica] Summarit 50/1.5
From: Dante Stella <dante@umich.edu>
Date: Fri, 26 Apr 2002 15:27:47 -0400 (EDT)

"Summitar" was a typo below.  Interesting anagram.

- ------------
Dante Stella

On Fri, 26 Apr 2002, Dante Stella wrote:

>
> The Summarit is not that exciting.  Like a lot of Planars of that era, it
> is essentially an f/8 lens that can also be shot at f/1.5 if necessary.
> The Xenon it came from is not a shooter's lens.
>
> If your main goal is to get a Leica product, you can't buy any f/1.5
> product made before the Summilux that is going to compete with
> Zeiss, Nikon or Canon.  The Summilux was the first lens that started to
> overtake Zeiss.
>
> These are, IME, the lenses and their optimizations:
> Canon 50/1.2 (1956) - open and close - peaks at f/5.6
> Nikkor 50/1.4 (1951) - open and close -  peaks at f/4
> Canon 50/1.5 (1949) - open and mid-range - peaks at f/5.6
> Zeiss Opton 50/1.5 (1946) - open and mid-range - peaks at f/4
> Summitar 50/1.5 (1951?) - mid-aperture, mid range - peaks at f/5.6-8
> Voigtlander Nokton (2000) - mid-aperture, mide range - peaks at f/8
>
> By "close," I mean about a meter.  By mid-range, I mean 3-5m.
> Interestingly, all of these cost about the same amount.
>
> In terms of effective speed, I don't think the new Nokton is as fast as
> one of the old Sonnar-types (which typically peak at f/4-5.6), because it hits
> the top of its performance (which is about the same 100 lp/mm) one to two
> stops smaller.
>
> Of these, my favorite is the Nikkor - why on earth would you get a
> high-speed lens and shoot it stopped down?  Fast lenses stopped down are
> never as good as slow lenses.  The key limitation with the Nikkor and the
> Canon 1.2 is plane of focus curvature, which translates into big flare
> wide open at infinity.
>
> Cheers
> ------------
> Dante Stella
>
> On Fri, 26 Apr 2002, Javier Perez wrote:
>
> > Howdy
> > It's a very old design. I think it was based on a
> > prewar Schneider Xenon. The only other option in the
> > Leitz camp if you have a screw mount camera would be a
> > screw mount Summilux if you can find one and are
> > willing the ridiculous price. The summarit isn't a bad
> > lens but it's prone to flare and gets blown away by
> > both the Summilux and the old Zeiss Sonnar. One
> > alternative might be the
> > Nokton from Voigtlander
> >
> > http://www.cosina.com/nokton50.htm
> >
> > See Ya
> > Javier
> >
> > --- Mark Kronquist <mak@teleport.com> wrote:
> > > on 4/25/02 5:12 AM, David C. Mason at dcm@pobox.com
> > > wrote:
> > >
> > > >
> > > > What can people tell me about the Summarit-M
> > > 50/1.5 - I have a chance
> > > > to get one cheap but I really don't know much
> > > about this lens.
> > > >
> > > >
> > > > Cheers,
> > > >
> > > > Dave
> > > > --
> > > > To unsubscribe, see
> > > http://mejac.palo-alto.ca.us/leica-users/unsub.html
> > > cheap and nasty. Unloved and from my experience
> > > rightly so. But others might
> > > have a different view. Buy a CV Nokton thanks  Mark
> > >
> > > --
> > > To unsubscribe, see
> > http://mejac.palo-alto.ca.us/leica-users/unsub.html
> >
> >
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>
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