Hyperfocal distance

Definition

Hyperfocal distance H is the closest you can focus and still hold infinity inside the circle of confusion: H ≈ f² / (N c) + f. Focus there and everything from roughly H/2 to infinity is “sharp enough” for that CoC. Landscape shooters use it to keep a foreground rock and a distant ridge both usable. It is a print-size decision, not a property of the lens alone. Recalculate if you crop hard or hang a huge print.

Calculators that use this

• Optics & depth of field

  Hyperfocal Distance Calculator

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

• 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.