At 11:55 AM 4/3/05 -0700, Jerry Lehrer wrote: >BTW, I just finished trying an f2.8 Jupiter 35mm lens in a >Contax IIIa, and it is a perfect fit. Why does it not fit yours? None of the Carl Zeiss Jena 2.8/3.5cm or 35mm Biogons nor its clones, the BK and Jupiter-12, will fit the Postwar IIa or IIIa body. This is the only incompatibility in the entire Contax RF line. Marc msmall@xxxxxxxxxxxx=20 Cha robh b=E0s fir gun ghr=E0s fir!