Originally Posted by
Martin Lord
Arash, I have not opened the converters yet so I do not know what I am talking about yet :-) My original thoughts were that the electronics in the Canon TC do not really control anything in the TC as there is nothing to control. So the whole think could be yanked out. Then if the Kenko electronics can be yanked out of the Kenko, and fit in the Canon TC, the only surgery is to hook out the 2 cables to the front and back connectors. In principle, i do not see anything wrong with this, but feasibility is unclear.
I double checked the sharpness results, it is really that bad. I gave a spin to the kenko at Bayland this morning. The pictures do not look better than the 5$ bill test. In addition to the lack of sharpness and contrast, the Kenko 2x exhibits a ridiculous amount of vignetting. I'll post a couple of shots below and that will be it for me with the Kenko 2X.