Autumn forest pictures are popular to create a nature wallpaper. Such as this one, an awesome photo by Aleksei Malygin with high quality result. Basically, the original photo of this wallpaper was in 3750×2500 pixels. But it was adjusted into 4K resolution with 3840×2160 pixels. Aleksei Malygin used a camera of Canon EOS 6D with several settings such as: f/10 1/125 17mm ISO400.