Distance for Subject Width
Rearranging the angle-of-view geometry gives a starting camera distance for a desired framing width.
Distance for Subject Width
Optics · 3 inputs
How to use this calculator
- Enter subject width in m.
- Enter focal length in mm.
- Enter sensor width in mm.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Keep capture settings, physical dimensions and delivery requirements in separate columns of the job notes. A mathematically equivalent setting may change motion blur, depth of field or noise. Check an actual frame before committing an entire session to a numerical estimate.
Leave compositional space and account for lens distortion; close-focus geometry is approximate.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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Hyperfocal Distance
Hyperfocal distance comes from a geometric sharpness criterion set by the circle of confusion.
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The near depth-of-field boundary estimates where defocus reaches a chosen blur-circle tolerance.
Open calculator ↗Far Depth-of-Field Limit
The far depth-of-field boundary follows the same geometric blur criterion as the near boundary.
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