Depth of field

Definition

Depth of field (DoF) is the slab of space that still looks sharp on a given print or screen. It is not a hard wall in the scene — it is defined by a circle of confusion. Longer glass, wider apertures and closer focus all shrink DoF. Hyperfocal focus pushes the far limit to infinity so the near limit is as close as that lens and f-stop allow. Confirm on a test shot at the intended viewing size; pixel-peeping a 45 MP file is harsher than an 8×10 print.

Calculators that use this

• Optics & depth of field

  Depth of Field Calculator

  Work out hyperfocal, near and far sharp limits from focal length, f-number, focus distance and circle of confusion. Metres native; toggle feet on location.

• Optics & depth of field

  Hyperfocal Distance Calculator

  Find the hyperfocal distance from focal length, aperture and circle of confusion so everything from half that mark to infinity is acceptably sharp.

• Optics & depth of field

  Macro Depth of Field Calculator

  Estimate total geometric DoF at close-up magnifications from f-number, magnification, CoC and pupil factor. Use it to decide whether to stack.