dtel:Coytee, what camera did you use that 85mm on.
The Contax camera was originally a German made camera. I don't know when, but it was then taken over by Yashica as their premium line. I think the story is, designed by Contax and built by Yashica. A Contax lens will fit a Yashica camera and vice versa. If you want an inexpensive way to use a Contax lens (made by Carl Zeiss of Germany) a Yashica camera body with a Contax lens is the way to go.
Carl Zeiss lens are used on Hasselblads, Rollei's, Contax... probably another one or two but those are the ones I know of. I THINK the only 35mm camera is the Yashica/Contax line, the others are medium format.
If you look at a digital point & shoot by (I think) Sony!!
Edit: I don't know that I really answered your question, I used it on a Contax RTS II. I also have a Contax 159 body and several more Contax lens.