Depth of field scale on SLR lens. (Top) Lens focus at 3 m; lower scale shows that f8 gives sharpness from 2 m to nearly 6 m. (Bottom) Focus 5.5 m, depth 3–10 m at f8
Depth of field scale on SLR lens. (Top) Lens focus at 3 m; lower scale shows that f8 gives sharpness from 2 m to nearly 6 m. (Bottom) Focus 5.5 m, depth 3–10 m at f8