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THE FEUTEX TOOLKIT

Focus Breathing Measurement

Measure framing change between focus distances using the same reference object.

Photography workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaFraming scale change = near/far; Relative framing increase = 100*(near/far-1)
Sources and model references

Worked example

Inputs

Near-focus object width
1200 pixels
Far-focus object width
1000 pixels

Expected results

Framing scale change
1.2 ×
Relative framing increase
20 %

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Measure framing change between focus distances using the same reference object.
  2. Set near-focus object width, far-focus object width in the indicated units.
  3. Calculate and compare framing scale change, relative framing increase.

Try this example

{
  "near": 1200,
  "far": 1000
}

Accuracy and scope

Keep camera position and reference object fixed. This measurement includes any actual subject-distance or camera-position changes.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.