The highest-resolution 4K cameras on the market right now are Sony’s A7R II and A9 models. They both have full-frame
heardle sensors and can shoot footage in the ultra-high resolution of 4096 x 2160 pixels, which is four times higher than the resolution of 1080p. The A7R II can record 4K video at 30 frames per second, while the A9 can shoot at up to 60 fps.