Depth of Field Calculator

How to use this. For portraits, you want a shallow DOF — long focal length (85mm+), wide aperture (f/1.8-2.8), close subject — which throws the background into pleasant blur. For landscapes, focus at the hyperfocal distance and stop down to f/8-11; everything from half that distance to infinity will be sharp. For macro work the DOF is millimetres wide even at f/16, which is why stacking is a thing. The Circle of Confusion is the diameter at which a point becomes visibly blurry on a standard ~8×10″ print viewed at arm's length — smaller-sensor cameras have less DOF latitude at the same equivalent framing, which is why phone cameras simulate it with software portrait modes.