Nikon DSLR Camera
4K HD Wallpaper: Nikon DSLR Camera
I think this is the best photography that feature a Nikon camera. Javier Morales is the photographer that made the picture and from his courtesy can be downloaded under CC By license. Here's optimized for fit in desktop backgrounds and homescreen phones.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)