Right after Nikon launched the D600 , canon countered with 20mp 6D. The 6D is well builted and although not quite as sturdy, or weatherproof as its more expensive. Overall the camera control layout is logical and convenient. The 6D optical view finder is large, brighter and clearer. Its a pleasure to use but if you look at the specs its 97% acurate. In 6D there is no built in flash. Slightly soft images on default settings. You have to use better lens for it.