Hi,I found an older Kenko teleconverter (about 15 years old) C-AF 2X Teleplus MC 4 and tried to use it in several camera-lens-combinations but the AF does not work. 5D, 7D and 700D with Canon 100mm/2.8, 50 mm/1.4 and 24 mm/2.8.Is there anybody with ...
