So I got the D750 with the 24-120 F4, the 70-200 F4 and 50 1.8G.
I still have to get around few settings but coming from a D90 is quite easy to start and do things without a manual. It was out in the snow storm but I didn't realize most of my shots were ISO 5000 and above; some around 10000 look quite good though.
Some quick testing showed significantly faster and more accurate continuous autofocus in low light. Single focus compared to the X-T1 in low light around the house is not that much faster than I thought, the X-T1 is quite dependent on the lens though.
I compared the Fuji 35 1.4 on X-T1, the 35 1.8G DX on D90 and the 50 1.8G and 1.8D on D750. Single focus is comparable. The 56 1.2 on the X-T1 is slower.
Otherwise I am not that impressed. The X-T1 holds his own on higher ISO shots. And I never realized how sharp the Fuji lenses really are, particularly wide open. The saving grace for the D750 is the big advantage in resolution, bigger than I thought it will be. If Fuji goes to 24MP things will change.
Back to the lenses I though hard if I should get the 16-35 F4 VR as it was on sale. I decided against for several reasons, and I might get the 18-35 3.5-4.5, and price was not one of them:
- big, twice as heavy as the 18-35 3.5-4.5
- not that sharp above 30 mm
- I don't use wider than 24 that much, so the 16 mm vs 18mm (or 18 vs 20 once you correct for the distortion) is not that important
- the 18-35 seems to be as sharp or sharper in the corners once stopped down
- the 18-35 will fit better in a light hiking kit (18-35, 50, 70-200) as it's sharper in the upper range
- the 18-35 seems to have enough weather sealing to be competitive
- VR will be missed though but I will likely have a tripod with me if it's a photo oriented trip
Overall I'll likely be happy with kit but the Fuji is more competitive than I thought, it needs few improvements and the autofocus is the main one.