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THE FEUTEX TOOLKIT

Thin Lens Image Position

Find image distance and signed magnification for a thin lens and real object.

Photography workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaSigned image distance = f*s/(s-f); Signed magnification = -f/(s-f)
Sources and model references

Worked example

Inputs

Signed focal length
50 mm
Object distance
100 mm

Expected results

Signed image distance
100 mm
Signed magnification
-1

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

How to use this tool

  1. Find image distance and signed magnification for a thin lens and real object.
  2. Set signed focal length, object distance in the indicated units.
  3. Calculate and compare signed image distance, signed magnification.

Try this example

{
  "f": 50,
  "s": 100
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

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.