I have the F-Mount 24-120mm f/4.0 lens and got curious as to the relative weights and dimensions of it and its new Z-Mount sibling.
Here they are:
F-Mount: 710g, 84mm (D) x 103mm (L), 77mm Filter.
FTZ-I: 140g, 70mm (D) x 30.5mm(L)
Total F-Mount: 850g, 84mm(D) x 133.5mm (L)
versusZ-Mount: 630g, 84mm (D) x 118mm (L), 77mm Filter.
Australian prices for the Z-mount lens only are about 10% lower than the F-mount lens on its own and about 25% less weight when the combined F-Mount and FTZ weights are considered.
Correction: Length of FTZ (ignoring the bayonet length) is just the difference in the F & Z mount register distances = 46.5mm - 16mm = 30.5mm.
That is definitely smaller than expected. I look forward to your impressions of it.