I would suggest against using a simple continuity tester to check out the Kenko. I also have a Tamron 1.4X (C-AF1 MC4), and although it doesn't convert the aperture to the correct value, it DOES have a chip inside. I discovered it after taking the converter apart because it was stuck on a lens (long, un-related story). I don't know what the chip does, but I'd be very concerned about applying large external voltages or currents to it.
Geoff Doane, Halifax, NS Malcom Stewart wrote: > > I have a Tamron 1.4 TC which simply transmits the lens aperture without any > modification, whilst my EOS 1.4x extender transmits a 1 stop reduced aperture > value. If you have access to a multimeter or even a torch and some wire you > could check out the corresponding Kenko contacts for 1:1 connection. (I assume > the Kenko doesn't include any form of chip?) * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
