Field of View Calculator

Formula

The formula to calculate the field of view is:

\[ FOV = \frac{FN}{M} \]

Where:

FOV is the field of view
FN is the field number (f-number)
M is the objective magnification

What is Field of View?

The field of view is the distance of the observable area seen through a microscope or telescope. It represents how much of the sample or sky you can see at one time.

Example Calculation

Example 1:

Field Number (FN): 20
Objective Magnification (M): 10

Step 1: Divide the field number by the objective magnification:

\[ FOV = \frac{20}{10} = 2 \]

Example 2:

Field Number (FN): 25
Objective Magnification (M): 5

Step 1: Divide the field number by the objective magnification:

\[ FOV = \frac{25}{5} = 5 \]