Sony has launched the a6400, the newest model in its range of APS-C mirrorless interchangeable lens camera system. The new model sits below the flagship model in the series, the a6500, and above the older a6300 model. The a6400 boasts of an improved autofocus system, that features 425-point PDAF system that can lock focus in 0.02 seconds. It also features advanced eye focus system that keeps the focus locked on the subject's eye instead of an arbitrary point. The camera features a 24.2MP APS-C sensor that is capable of 4K recording with full pixel readout. The camera can do...