Yes, Nikon will clean it for free but its a real issue. A photographer we use at work regularly shoots with a D800 and I constantly have to clone-stamp any photos with sky in them. The extra resolution on the D600 is nice and the low is dynamic range is as good as it gets if you constantly pull-up shadows but the 6D has the best high iso of any camera other than a 1dx... Have a look at the dpreview comparison thingy.
Its all swings and roundabouts and if you have any Nikon lenses then you might as well get the D600.
Yes, Nikon will clean it for free but its a real issue. A photographer we use at work regularly shoots with a D800 and I constantly have to clone-stamp any photos with sky in them. The extra resolution on the D600 is nice and the low is dynamic range is as good as it gets if you constantly pull-up shadows but the 6D has the best high iso of any camera other than a 1dx... Have a look at the dpreview comparison thingy.
Its all swings and roundabouts and if you have any Nikon lenses then you might as well get the D600.