I thought the 10.6 was F mount DX?
16-50 is DX in Z mount. Thus it would work to perfection on my Z50, if I were to buy it.
10.5 Fish is DX in F-mount. If the lens hood is shaved off, it can do pretty well on FX camera (DSLRs) as the image covers > 200 degrees there. With two captures one can even get perfect circular fisheye images.