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Depth of Field Calculator

Find the near and far focus limits and total depth of field.

Focal length

Aperture (f-number)

Focus distance

Circle of confusion

Calculated Output

Depth of field 0.5996

Near limit 2.73

Far limit 3.329

Formula: Near/far limits from the hyperfocal distance

Step-by-Step Breakdown

1. Values used:

2. Focal length = 50

3. Aperture (f-number) = 2.8

4. Focus distance = 3

5. Circle of confusion = 0.03

7. Depth of field = 0.5996

8. Near limit = 2.73

9. Far limit = 3.329

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The math behind it

From the hyperfocal distance H, the near limit is Hs/(H+(s-f)) and the far limit Hs/(H-(s-f)).

50 mm at f/2.8 focused at 3 m gives roughly 0.3 m of depth of field.

How do I get more depth of field?

Use a smaller aperture (higher f-number), shorter focal length, or focus farther away.