The resolution of this cameras is astounding. Detailed files like you can’t believe. It’s slow, though, which is predictable, relative to the file size. Not the camera of choice say, for a helicopter shoot, where you are burning frames in continuous high. You will buffer this camera out if you try to go high speed on something. As a portrait camera, under controlled conditions, it’s a beautiful thing. Color leaps out at you. Impeccable detail, even when blowing it up like crazy. All around, a great complement to the D4s. Both cameras always go out with us. D4s just shoulders the load on most days.