Depth Of Field (DOF) effect using large aperture. There is a lot of information in the web [1, 2, 3, 4, 5]. This is a testing photo by Nikon D200 and Nikkor Ai 180mm F2.8 manual lens. Depth Of Field (DOF) effect using large aperture. There is a lot of information in the web [1, 2, 3, 4, 5]. This is a testing photo by Nikon D200 and Nikkor Ai 180mm F2.8 manual lens. 