« on: December 03, 2012, 07:35:26 PM »
To get the Kenko 1.4x to cooperate with your 5DmkIII, you must first disable AFMA and then *take one picture*. After that you can swap on your TC and everything should work normally – apart from having AFMA. You can also re-enable AFMA immediately as long as your TC+lens combo doesn't actually use it (i.e. has +0 setting).
I tested this with 100L and 200L/2.8 using the "blue dot" TC.
I just tested this with 5D III, 100L, and Kenko 1.4x "blue dot," and nope, it still doesn't work. After the "workaround," when I press shutter, the camera STILL freezes up, with taking the battery out the only way to revive it.