The Sony Alpha a9 is the company's flagship full-frame mirrorless camera. It features a 24MP stacked CMOS sensor which permits 20 fps burst shooting without the 'blackout' found on traditional DSLRs courtesy of its electronic shutter. Its autofocus system has been improved, with a total of 693 phase-detect points covering 93% of the image area and Eye AF that's 30% better compared to the a7R II.