Enter the distance to an object, the f-number, circle of confusion, and focal length into the calculator to determine the depth of field.

## Depth of Field Formula

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

DOF = 2*u*N*c/f2

• Where DOF is the depth of field
• u is the distance to the subject
• N is the f-number
• c is the circle of confusion
• f is the focal length

## Depth of Field Definition

A depth of field is defined as the distance between the nearest and furthest distances that are the acceptably sharp focus in an image.

## Depth of Field Example

How to calculate a depth of field?

1. First, determine the distance of the subject.

Measure the distance of the subject.

2. Next, determine the f-number.

Calculate the f-number of the lens.

3. Next, determine the circle of confusion.

Calculate the total circle of confusion.

4. Next, determine the focal length.

Measure or calculate the focal length.

5. Finally, calculate the depth of field.

Calculate the depth of field using the equation above.

## FAQ

What is a depth of field?

A depth of field is a measure of distance between the nearest and furthest objects that are acceptably sharp in an image.