Calculatorism

Macro Magnification

Compute magnification = extension / focal length from tube length and lens focal.

Input Data

Input Extension.
mm
Input Lens focal.
mm

Results

0.5
Magnification = extension / focal.

At a glance:Macro Magnification: enter parameters to compute results; complements related calculators.

Formula

Magnification = extension / focal.

How to Use

  1. Enter extension, focal.
  2. It returns magnification (×).

Case Studies

25mm / 50mm = 0.5×

1:1 macro needs extension = focal.

FAQ

1:1?

Magnification 1.0 = life-size (image = subject).

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Macro Magnification（/photography/macro-magnification）。