Archived posting to the Leica Users Group, 1998/04/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]While we are on the topic of testing, has Leica changed the way the evaluate their own lenses? Laney's book "Leica Lens Practice" claims that Leitz (and later Leica) prefer "Edge Spread Function" over MTF measurements. The former is supposed to be a more accurate way of quantifying the characteristics of a lens associated with the "Leica look." (I even read some of the technical papers by Leitz staff cited in Laney's first edition and their rationale seems sound.) I now see that Leica is publishing MTF graphs of new lenses (e.g. in the PDF files available on the Leica web site). Does anyone know if this marks a change in Leica philosphy or are simply yielding to the fact that more people recognize MTF graphs and know what to do with them? Thanks M. Cenzer - -- Matthew A. Cenzer Department of History Northwestern University mailto:mcenzer@nwu.edu