I had a close encounter with the Sony XDCam PXW-FS5 at InterBee 2015. Unveiled in September with prototypes, this Super35 camcorder can shoot in 4K in excellent quality and low-noise, thanks to its very good noise-reduction algorithms. The lenses are interchangeable, so you can adapt its use to many different situations.
The main reason of being for this camcorder is its small size relative to its older sibling, the Sony XDCam PXW-FS7. In fact, this camera is small and light enough (800g) to mount on a (professional) drone once the handgrip is removed. I would just be very wary of drone crashes, since it’s not really cheap.
Interestingly enough, this camcorder records onto SD cards (2 slots) at 4K/30FPS at maximum quality using the XAVC-L CODEC. It is also possible to record in AVCHD in 1080p or 720p at 60FPS. The slow-motion mode can reach 960 FPS using ¼ HD resolution or 240 FPS in 1080p.
This is a great pro or semi-pro camcorder that has a great mix of quality, portability and features.