Based on high-speed BIONZ X image processing engine, Model a7R II utilizes back-illuminated 35 mm full-frame Exmor R CMOS sensor, which realizes 42.4 MP resolution, high sensitivity expandable up to ISO 102400, and high speed AF response due to 399 focal plane phase detection AF points. Interchangeable lens camera also includes 5-axis image stabilization system and can shoot and record 4K video in multiple formats, including Super 35 mm without pixel binning, and full-frame format.