Archived posting to the Leica Users Group, 1998/09/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>Lugnuts, > >I caught the tail end of a Zeiss seminar ( quite a creature ;-) in Minneapolis the other day. They had on display a number of Ektar 25 prints made from Carl Zeiss lenses. The prints were all incredibly sharp. > >What was of interest were the following statements in a >handout describing the gear involved: 1.) " One hundred >twenty to 130 lppm is necessary to make a high quality 16 X 20 print". 2.) Describing their Planar 50 f1.4, set at f8; "This is the highest resolution ( 200 lppm across the entire field ) lens available in the world for general photography". > >Questions are as follows: 1.) What Leica lenses would meet the 120-130 lppm criteria? 2.) How does the new R-50 f1.4 compare to the Zeiss 50 f1.4? 3.) Does the RTSIII vacuum back ( flatter film )enhance the sharpness of a lens significantly? >Tom D. > ############# I can only give the results of the tests made in 1987 by Chasseur d'images for the 1.4/50 lenses. The summilux R (old type) is better than the planar at full stop and up to 2.8. The summilux has field curvature ; the planar is...plane.From f4, the quality is the same for both of the lenses: excellent. If, according to Leica Camera, the new summilux is better than the old type,it is obvious than the Leica lens is superior to the Zeiss one. Dominique Pellissier