Find the near and far in-focus limits and the depth of field at a given focus distance.
Depth of field is the zone of acceptable sharpness around the focus point, bounded by near and far limits derived from the hyperfocal distance. A wide aperture and long focal length thin the sharp zone for portraits, while a closed aperture extends it for landscapes.
Depth of Field
Near = Hd/(H+d-f); Far = Hd/(H-d-f) where H is hyperfocal distance
Near = Hd/(H+d-f); Far = Hd/(H-d-f) where H is hyperfocal distance Depth of field is the zone of acceptable sharpness around the focus point, bounded by near and far limits derived from the hyperfocal distance.
A wide aperture and long focal length thin the sharp zone for portraits, while a closed aperture extends it for landscapes.
This calculator takes 4 inputs: Focal length, Aperture (f-number), Focus distance, Crop factor. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.