Archived posting to the Leica Users Group, 2009/08/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Richard, it is just a broad comparison as you say. However, your examples actually do show the superiority of the Summarit quite clearly. Just to pick the most obvious the 60 (at f/4.0) looks to reproduce about 92% MTF at 10 lpmm which is the least demanding measurement. Just ignore where the fall off begins as the four thirds sensor is disadvantaged there and you can't compare the dimensions directly. The Summarit (at f/5.6) is providing it looks like about 96-98% at the same lpmm. That is a significant and important difference for contrast and resolution if you care about theoretical best performance. I am NOT saying that the 12-60 in that system doesn't perform well. I am saying you really don't want to pick a fight with Leica primes on MTF diagrams ;-) By the way, the Summarit of course is not leading edge, it is a less expensive spherical design to offer an alternative price point. It might say something about Leica customers that they are outsold 2 to 1 against the more expensive 50! The best comparison to that particular range would be the excellent Zeiss ZM designs. In Solms, Leica has some large prints from the Summarits about one metre wide on the factory wall. Very impressive indeed and you can even press your nose against them to 'pixel peep' the prints. 2009/8/14 Richard Man <richard.lists at gmail.com> > Yea, it is not good enough to make a accurate technical comparison, > but the point is, it's not a wholesale slaughter as implied. > > I just do screen cap of the PDF files. > > On Thu, Aug 13, 2009 at 3:43 PM, > wildlightphoto at earthlink.net<wildlightphoto at earthlink.net> wrote: > > What frequencies? And, the 4/3 file needs to be enlarged more to give an > > equal-sized print. More data needed to make a meaningful comparison. > > > > > -- > // richard m: richard @imagecraft.com > // w: http://www.imagecraft.com/pub/Portfolio09/ blog: > http://rfman.wordpress.com > // book: http://www.blurb.com/bookstore/detail/745963 > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Cheers Geoff Alles was eine gute Kamera braucht / Everything a good camera needs: http://gallery.leica-users.org/v/gh/ http://www.pbase.com/hoppyman