Archived posting to the Leica Users Group, 1998/09/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Are any of these lenses actually made by Carl Zeiss or are they just designed by Zeiss for the Japanese manufacturer? Bud "Thomas J. Donovan" wrote: > 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? > > All lenses ( 21mm, 50mm, 60mm Macro , 100mm Macro) > used were on a tripod, Contax RTSIII, mirror up, shot at f8, > & used Ektar 25. BTW, all of these lenses were at least 130 > lppm across the entire field at f8 > > Has anyone out there ever used a Contax RTSIII & compared > results to Leica gear? > > It was impressive stuff :-e ! > > Tom D.