The Sony a9 impressed with its full frame 20fps Stills shooting at 24.2 Megapixels. It is probably the most groundbreaking camera performance wise we have come across for sports shooters in a decade. The AF performance is second to none and as recent samples show it is just as good in video mode. Sony has cracked the continuous AF for video performance threshold where it can be used for production. That is no small feat.
What was totally unexpected was that the 120fps slow motion mode at full HD, which has a full sensor downsampling without crop of the 35mm FF sensor, is not only good; but probably the most detailed full HD slow motion mode we have seen in a DSLR or Mirrorless camera to date.