Focus distance calculator guide
Focus Distance Calculator for Photography and Video
Focus distance is the distance from your camera to the subject plane. A calculator shows how that focus point expands into a near and far sharpness range.
Fast answer: Simple DoF Calculator lets you enter focus distance from 1 inch to 999 feet and see depth of field update instantly.
Why focus distance changes the result
At close distances, depth of field is shallow. Farther away, the focus range grows. This is important for documentary video, interviews, product photography, street photography and focus pulls.
How to use the app
- Pick your camera and lens setup.
- Measure or estimate the camera-to-subject distance.
- Enter that focus distance in the app.
- Read the near and far focus limits.
- Adjust aperture or focus distance until the subject movement fits inside the range.
For video and focus pullers
Use the result before a take to understand how much tolerance you have if an actor or subject moves toward or away from camera.