PENTAX K / CANON EOS

To put an objective Pentax K on analogical and numerical Canon EOS. One loses the automatic preselection of diaphragm (the diaphragm functions manually) the photographic exposure meter functions with all the all numerical cases (300D, 350D, 10D, 20D....) The ring new manufactured out of hardened aluminium and is anodized in black. One blocks this ring on objective by tightening a screw. I have also rings to assemble on the EOS the objectives: Nikon, Yashica/Contax, Leitz, Olympus OM, M-42.