thanks
No surprise this S Line Nikkor receives the "Highly Recommended" from cameralabs
Useful that this review compares both TC + 100-400 combinations against key options (including 70-200 f2.8S with Z-TC2):
"....the Z 100-400 + TC-1.4x performs astonishingly well....At 400mm focal length the Nikon Z 100-400mm f4.5-5.6 VR S and F-Nikkor again are very close while the combo of Z 100-400 + TC-1.4x loses a bit of definition outside the center and the Z 70-200 + TC-2.0x is clearly the softest. Even after cranking up sharpening the Z 70-200 + TC-2.0x still shows some softness... The Z 100-400 delivers good results on Nikon’s TC-1.4x wide open (f8.0) even at 560mm focal length. "
".... All-in-all the new Nikon Z 100-400mm f4.5-5.6 VR S zoom lens is sharper than it’s predecessor and also the better alternative to using the Z 70-200mm f2.8 VR S with TC-2.0x. Evidence to its superior performance are the results on a TC-1.4x which are only a tad softer although the teleconverter magnifies any fault of the lens attached to it by 1.4x. "