Archived posting to the Leica Users Group, 1997/10/31
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 12:37 PM 31-10-97 -0400, Paul wrote: [snip] >You know those little numbers after the distance scale, which tell you >what the actual focal length is? When I was photographing stuff for the >Photo Techniques article, at one point I examined two of these lenses at >the same time, (both chrome), and happened to notice that one was marked >00 and the other 90. This means that the second one was nearly 100mm. >This made me wonder if there was not something different going on here as >far as optical formula. Both lenses looked identical. > 100mm? I thought that the 90 on the scale indicated that the actual focal length was 90.90, or roughly 91mm. Whether this is correct or not, what number would appear if the actual focal length was less than 90? Dan C.