Telescope Magnification Calculator

Formula

To calculate the Telescope Magnification (\(M\)):

\[ M = \frac{FL}{D} \]

Where:

\(M\) is the Magnification
\(FL\) is the Focal Length (mm)
\(D\) is the Eyepiece Diameter (mm)

What is Telescope Magnification?

Telescope magnification is a measure of the total enlargement of an image that occurs through the lens of a telescope. For example, if a telescope increases the size of the moon by 10 times the normal eyesight size, then the total magnification is 10.

Example Calculation 1

Let's assume the following values:

Focal Length (\(FL\)) = 1000 mm
Eyepiece Diameter (\(D\)) = 25 mm

Using the formula:

\[ M = \frac{1000}{25} = 40 \]

The Magnification is 40.

Example Calculation 2

Let's assume the following values:

Focal Length (\(FL\)) = 1200 mm
Eyepiece Diameter (\(D\)) = 20 mm

Using the formula:

\[ M = \frac{1200}{20} = 60 \]

The Magnification is 60.