Ok
heh i did buy two more lens from ebay again have to test more what is the best lens
it was RODENSTOCK APO RODAGON N 2,8/50mm and Leica Leitz Focotar-2 1:4.5/50
but i have a feeling that the lens i have allready is the best maby Rodenstock APO-RODAGON D 75mm 1x f/4