Hasselblad chose Friday to unveil a long-in-progress upgrade to its H System medium format cameras. The H4D is billed as one of the first cameras to have a true off-center autofocus system, known as True Focus. Where even DSLRs often have to first focus and then reposition the camera to get focus significantly away from the center, the H4D has a yaw rate sensor that can detect the horizontal and vertical movement away from the focus point and refocus the lens to compensate.
