Archived posting to the Leica Users Group, 2002/04/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]"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 > > > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Games - play chess, backgammon, pool and more > > http://games.yahoo.com/ > > -- > > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html