Archived posting to the Leica Users Group, 2000/05/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Check the MTF curves for both the film and the lenses. You'll note that the response for each peaks at 5-15 lp/mm, and each, of course, is higher than any competitors at that level. In other words, what makes Leica lenses so noticeably sharp is their superb contrast transfer function at the 5-15 lp/mm region. Kodachrome 25 also happens to excel in this region, and has the highest visible sharpness of any film (for that reason). High contrast above about 25-30 lp/mm is not as important (actually, it's quite useless) for human perception of clarity and sharpness. Some other brands of lenses and films have higher transfer functions in that region (above 25-30 lp/mm) but none has equaled the Leica/Kodachrome 25 juggernaut. Get your FREE Email at http://mailcity.lycos.com Get your PERSONALIZED START PAGE at http://my.lycos.com