Archived posting to the Leica Users Group, 1998/04/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 11:16 AM 4/21/98 -0500, you wrote: > >Dominique, Duncan, Erwin et al.: I have noted over the years a certain >reluctance by Leitz to publish the MTF curves. I think that was in part >related to the company's condescension to its users' intellectual ability >in undestanding optics. It is only a recent development that some MTF That's not likely the case at all. First of all, one MTF chart is almost meaningless. Why? Because a chart only shows one test, and it takes hundreds of tests, different parts of the lens (center, edge, half way) different colors of light, different lp/mm, etc. etc. Showing one MTF chart is the equivalent, to me, of looking at one line of a food's nutrition able. Some drinks have 100 per cent of the vitamin C one needs, but not much else. One chart says how the lens tested out in one way. At least, that was Leica's argument. Let's not attribute a bad attitude to Leica that isn't deserved. And to extrapolate the Zeiss MF lens performance with the 35mm lenses is not a good idea. They are totally different in design. They are great lenses, for sure, but only using a lens will really tell you if you will like it. ========== Eric Welch St. Joseph, MO http://www.ponyexpress.net/~ewelch He doesn't have much of a reputation, or so I've heard.