There's a lot that the Hasselblad X1D II 50C gets right but there are still some major issues with this medium format mirrorless camera system, reviewers said. While image quality from the 50MP, medium format-sized (43.8mm x 32.9mm) image sensor was excellent, like its predecessor, the new X1D II is frustratingly slow to use, particularly the autofocus. And, in low low light, the camera's AF is "basically unusable," according to Digital Trends. That's a shame because the X1D II is beautifully designed, ergonomic and, otherwise, a joy to use.