[. . . ] Reverse) Various interchangeable focusing screens are available for Nikon F6, F5, F4- and F3-series cameras to suit any type of lens or picture-taking situation. [. . . ] Since type M screen can be used for both macrophotography at a 1:1 magnification ratio and for photomicrography, it has different applications than other screens. When using the B/B2/B3, E/E2/E3, and K/K2/K3 focusing screens in cameras other than those listed above, refer to the columns on the F4 + DP-20's B, E and K screens, respectively. B, when the subject is highly patterned or of low contrast, such as a field covered with flowers, autofocus may be difficult to obtain. In such situations: (1) Focus on a different subject located at the same distance from the camera, then use the focus lock, recompose, and shoot. [. . . ] A, when a person standing in front of a distant background is placed within the focus brackets, the background may be in focus, while the subject is out of focus. [. . . ]