User ID wrote:
THAT !! would be rather astounding.
The lesson here is that the UHH clown car is not necessarily better than that camera store clerk. Its perfectly possible that the OPs DX lens is an old shaft drive AF lens that cannot AF on the FTZ converter. Photos attached.
If the OP will post pix of the ID nomenclature on his DX lens, or a good clear pic of the lens flange, this particular issue would be settled.
What would have been amazing was not to mix units - the frame size that the Z6 would default to with a DX lens is 24mm x 16mm (3936 x 2624 pixels). The most common myth I hear is that a DX lens won't work - they probably will work, but some maybe with limited functionality!