The wait is over, and Canon has unveiled its brand new flagship pro sports, action and press camera, the EOS-1D X Mark II. Keen Canon watchers have long suspected a new top-of-the-ranks model was in the wings, but it's only now that the specifications have become official. Even better, Canon invited us to a special one-on-one session to see the camera ahead of the official announcement.The EOS-1D X Mark II is a replacement not just for the original 1D X, but the EOS-1D C pro video camera too. In some areas it reads like a modest upgrade of the tech in the 1D X, but in others it breaks while new ground.Canon says the new camera's been developed following feedback from existing 1D X users, and what may sound like minor changes to the controls and layout can be a big deal for professionals who use these cameras day in, day out. We were able to try out the 1D X and 1D X Mark II side by side, and they are so similar it would be easy to get them confused, especially with the camera held to your eye.But the big news stories are the Mark II's amazing continuous shooting mode, its improved autofocus system and its 4K video capability.