The a7R II is still too new to provide a complete review, but it has amazing potential. The 42-megapixel sensor promises greater detail than a D810 and almost the same detail as the Canon 5DS-R. A stabilized sensor means you’ll get better image quality out of any lens, even a fast prime without stabilization. 4k video means the camera simply has no compromises. But the previous-generation a7R promised to be the ultimate camera, too, and fell short in many ways. We’ll test the a7R II as soon as we can, and update the book with detailed information.