Question 1

What is depth of field in photography?

Accepted Answer

Depth of field (DoF) is the distance between the nearest and farthest objects in a photo that appear acceptably sharp. A shallow DoF (blurry background) is achieved with wide apertures and long focal lengths, while a deep DoF (everything sharp) uses narrow apertures and wide lenses.

Question 2

What is hyperfocal distance?

Accepted Answer

Hyperfocal distance is the closest focus distance at which everything from half that distance to infinity appears acceptably sharp. Focusing at the hyperfocal distance maximizes depth of field for landscape photography.

Question 3

How is depth of field calculated?

Accepted Answer

Depth of field is calculated using focal length, f-number (aperture), subject distance, and the circle of confusion (determined by sensor size). The near and far limits of acceptable focus are derived from the lens equation.

Question 4

Does this calculator work offline?

Accepted Answer

Yes. All calculations happen entirely in your browser. No data is sent to any server, and the page works even after it has loaded.