Kenko teleconverter C-AF 2X Teleplus MC 4 - no autofocus

[chili77]

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 similar experiences? Maybe the older converters are not suitable with modern cameras?

Thanks a lot!

[ebiggs1]

"Extension tubes are simple, teleconverters a bit less so."

And both are 'nearly' useless!