YASHICA & CONTAX / CANON EOS

To put an objective Yashica or Contax on analogical and numerical Canon EOS. One keeps the development ad infinitum. One loses the automatic preselection of dia (the diaphragm functions manually) the photographic exposure meter functions with all the numerical cases (300D, 350D, 10D, 20D....). The ring is new manufactured out of bronze chrome. I have also rings to assemble on the EOS the objectives: Nikon, Leitz, Olympus OM, Pentax K and M-42.