Well well, already has been close to a month since I have sold all of my Nikon gear and go full-time Fujifilm. I have been shooting full frame for a while now, going back to APS-C seemed huge to me. Anyhow do not expect a very formal numbers based review here. This is based on how I shoot and really my personal experience with the Fujifilm X-T2.
I mostly shoot portraits and weddings so in the first months that I have owned the camera, I had a few shoots and one wedding (surprisingly since not so many people get married in winter). My collection of lenses for now are the 18-55mm f2.8-4, 35mm f1.4 and the 56mm. In the future, I plan on getting the 18mm, 23mm (not quite sure about which one yet) and a macro lens. The lens lineup from Fujifilm is incredible. Most of them produces extra sharp beautiful images and are top notch when it comes to construction. The same cannot be said about Canon or Nikon lenses. Many of their lenses are not well constructed and some of them have horrible image quality. I am not a difficult when it comes to image quality from a lens but sometimes it is just unacceptable. Since the lenses covers a small sensor, they are mostly cheaper and smaller which a huge plus for me. Carrying all the gear during the whole day for a wedding was much easier without the need of a huge bag that can be heavy by itself.
So is the difference between APS-C and full frame that discernable? I would lie if I said no. There is a difference when it comes to depth of field but besides that, not much can be said. Low light performance is almost par to the best of full frame cameras (minus the Sony A7SII) and image quality from the sensor surpasses many of the current lineup of top cameras. The image sensor kept up in very difficult situations during the wedding, giving excellent dynamic range and low light sensitivity to tackle some of the hardest situations with relative ease.
The EVF on the Fujifilm is just superb. Being able to see what the picture would look like before you take it has been priceless for me during my portrait and wedding shoots. The EVF is also very customizable when it comes to what can be displayed. Add the battery grip and the display gets better with a higher FPS. Immediately seeing the results in the EVF while shooting is a huge plus as you do not need to take your eyes off to check the screen each time.
The dials on the button is the main strong point for me on the Fujifilm X-T2. Many of the Fujifilm bodies have similar dials but none of them come close to the functionality of the X-T2. All the important controls are easily accessible and the dial lock button works with wonders. The aperture ring on some lenses are too loose but I still prefer that over the solution offered by most of the manufacturers.
The autofocus is also very excellent. Fast AF using the live view has been a fantastic tool for me during wedding for many difficult shots. Continuous autofocus is not something I use often so will not comment on that. Where it failed was during low light situations. On paper, the X-T2 is as sensitive as the D750 in low light for focusing, this has not been the case for me in a reception hall. It was hunting very often and I missed a lot of shots that night unfortunately. This however also depends on the lens. The 35mm and 18mm struggled but had more success than fails while the 18-55mm was downright horrible, missing most shots.
In conclusion, I am very happy with the switch. I plan on getting a new body each year from now on. I dream of owning the GFX but it is not in my budget at the moment. Next, I will post my usage on the lenses I have so stay tuned.