Just as a point of information for those who have recently got a 6D or are considering one. One significant difference from the 5D line in terms of operation is the zoom functionality. I found it a little difficult at first, and still on occasion lapse into the other way of trying to magnify. The 6D actually has a good, logical system after you make the mental switch. To magnify, hit the zoom button and then you can use the scroll wheel near the shutter to zoom in and out. It actually is smoother than button mashing, but it is very different from other bodies and takes some mental adjustment.