Enter the field number (f-number) and the objective magnification into the calculator to determine the field of view.

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- Magnification Calculator
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## Field of View Formula

The following formula is used to calculate a field of view.

FOV = FN / M

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

To calculate field of view, divide the f-number by the objective magnification.

## Field of View Definition

A field of view is defined as the distance of the observable area seen through a microscope or telescope.

## Field of View Example

How to calculate a field of view?

**First, determine the f-number.**Calculate the field number.

**Next, determine the objective magnification.**Calculate or measure the magnification.

**Finally, calculate the field of view.**Calculate the field of view using the equation above.

## FAQ

**What is a field of view?**

A field of view is the total amount of distance across the observable area of a microscope.