Archived posting to the Leica Users Group, 1998/09/25[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
>>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 ########### PS : The test made by Zeiss is stupid. A 1.4/50 lens has been designed to be used at full aperture and not at f8.