From today, I’m the proud owner of the FujiFilm X-T3 mirrorless camera together with the Fujinon XF100-400mm F4.5-5.6 R LM OIS WR lens.
Choosing FujiFilm is not evident for wildlife photography. Most photographers prefer Canon, Nikon or Sony equipment, mainly because those brands have a broader choice of telephoto lenses.
You can have a silver or black finish, for my kind of photography the choice is obvious, the less shiny, the better, so I bought the black version. You can also buy the VG-XT3 battery grip. It makes taking portrait-oriented photos with the shutter-release button on the grip much easier, and I have big hands!
Currently (2019), FujiFilm doesn’t produce lenses for the X-series with a focal length of more than 400mm. This is almost a deal-breaker for me, but their Fujinon XF100-400mm F4.5-5.6 R LM OIS WR is impressive! This is by far the sharpest lens I have ever owned! This duo is perfectly compact without sacrificing picture quality. Now I can walk all day long without worrying about the weight.
(Update 2021: There are rumours that FujiFilm will produce a 200-600mm lens soon. Wait and see).