Archived posting to the Leica Users Group, 1997/08/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > At test (some years ago) said: Planar 2.8/80 < 20 l/mm, Summicron (>1980): 36 > l/mm > -Alf > These figures seem low. I have been doing lens resolution tests for another UG. Since I have these two lenses, I'll put them through the test also and post to the LUG in a week or so. BTW, I use print film for resolution tests. The prints are handy for evaluating certain aspects of a lens' performance (like color fringing). I can also look at the neg with a high quality microscope (Leitz) and get resolution figures if I feel there is any compromise in the printing process, but often I can find the limits of lens performance on the print. Although I can't really judge color balance and contrast from a negative well, the pfotofinisher I use produces consistent enough results to get a relative indication. Besides, I usually include some standard scenic shots for reference in my test roll. Paul.