Archived posting to the Leica Users Group, 1998/11/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Nathan, >>but I still cannot see how a film can produce more detail than in >>the original scene. looks I donīt explain very well. Another try : we are not about 'more detail' here, but about 'more contrast' (i.e. a bigger difference in luminance/light transmission). The y-axis of the MTF graph denotes how much of the contrast between the white and the black lines of the resolution target is reproduced on the film. So 50% means that the contrast on film would be half of the original contrast. A value above 100% can be achieved by contrasty films. The best example is a special kind of repro film (donīt know the correct English word, in German itīs called 'Strichfilm') that is either black or white but never grey. This is simply achieved by the film exaggerating whatever contrast there is. Hope this helps Carsten http://ourworld.compuserve.com/homepages/Carsten_Bockermann/