Hi there,
The AF on my D7000 not working properly with my AF-S 300mm F4 after using a TC-14 E II.
It worked OK with the TC for about a day, then AF wouldn't work.
I have returned the TC.
I occasionlly can get the AF working, but generally it is not usable.
Have had no AF issues before buying the TC-14E ii.
My other AF-S lenses work fine on the D7000, and the 300 F4 works fine on my D300 (forgot how slow it is).
I have cleaned contacts, done a 2 button reset, and updated the firmware, all to no avail.
There is no Nikon service in Darwin, and I'm not keen to send them away for weeks.
Any assistance would be greatly appreciated.