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Telescope Magnification

Calculate Telescope Magnification instantly with the exact formula and a worked example.

Telescope Magnification

Objective focal, mm
Eyepiece focal, mm
Magnification
40
Calculate Telescope Magnification instantly with the exact formula and a worked example.

More about: Telescope Magnification

What it calculates

The “Telescope Magnification” calculator computes Magnification from 2 parameters: objective focal, mm, eyepiece focal, mm.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters Objective focal, mm = 1,000, Eyepiece focal, mm = 25 the result is 40.

How to use

  1. Enter objective focal, mm and eyepiece focal, mm — each field above is adjustable with a slider.
  2. Magnification is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Telescope Magnification calculated?
The Telescope Magnification calculator computes Magnification from objective focal, mm, eyepiece focal, mm. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Telescope Magnification calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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