Though it's the fifth model in Sony's full-frame E-mount lineup, the a7R II arguably represents just as much of a technological leap forward as its first mirrorless full-frame predecessors did. Its 42MP full-frame BSI CMOS sensor, 399 on-sensor phase detection point AF system and 5-axis IS are just a few reasons why the a7R II is one of the most talked-about cameras of the last year. See how it performed in our comprehensive testing.