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THE FEUTEX TOOLKIT

Studio Backdrop Frame Coverage

Check background coverage when subject-plane framing expands behind a subject.

Photography workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaNeeded width = frame_width*(camera_subject+subject_backdrop)/camera_subject; Margin = backdrop_width-frame_width*(camera_subject+subject_backdrop)/camera_subject

Made for real tasks

  • Check background coverage when subject-plane framing expands behind a subject.
  • Compare two scenarios by changing the inputs and rerunning the tool.
Explore step-by-step workflows →

Worked example

Inputs

Frame width
2 m
Camera subject
3 m
Subject backdrop
1 m
Backdrop width
3 m

Expected results

Needed width
2.666666667 m
Margin
0.3333333333 m

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

How to use this tool

  1. Enter frame width, camera subject, subject backdrop, backdrop width.
  2. Use consistent units shown beside each input. Run the calculation and review the assumptions below.

Try this example

{
  "frame_width": 2,
  "camera_subject": 3,
  "subject_backdrop": 1,
  "backdrop_width": 3
}

Accuracy and scope

Pinhole geometry with parallel planes and centered camera; excludes distortion and backdrop curvature.

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.