Depth of Field Calculator

Camera, film format, or circle of confusion

Focal length (mm)
Selected f-stop
Subject distance

Subject distance  10 ft
Depth of field 
Near limit  7.69 ft
Far limit  14.3 ft
Total  6.61 ft
In front of subject  2.31 ft (35%)
Behind subject  4.3 ft (65%)
Hyperfocal distance  32.8 ft
Circle of confusion  0.019 mm
Use the actual focal length of the lens for depth of field calculations. The calculator will automatically adjust for any "focal length multiplier" or "field of view crop" for the selected camera.

Focal lengths of digital camera lenses are listed here.
Focus at the subject distance, 10 ft  
6.61 ft
7.69 ft   14.3 ft
  Focus at the hyperfocal
distance, 32.8 ft
  Depth of field extends from
16.4 ft to infinity

Depth of Field Definition

Hyperfocal, near, and far distances are calculated using these equations.

Circles of confusion for digital cameras are listed here.

Depth of Field (DOF) is the range of distance in a photo that appears to be in sharp focus ... Depth of field is a creative decision and one of your most important choices when composing nature photographs.

Nature Photography Photo Workshop, Nat Coalson, 2011

Simply put, depth-of-field is how much of a photograph is in sharp focus from front to back.

Digital Landscape Photography: In the Footsteps of Ansel Adams and the Masters, Michael Frye, 2010.

We can achieve critical focus for only one plane in front of the camera, and all objects in this plane will be sharp. In addition, there will be an area just in front of and behind this plane that will appear reasonably sharp (according to the standards of sharpness required for the particular photograph and the degree of enlargement of the negative). This total region of adequate focus represents the depth of field.

The Camera (Ansel Adams Photography, Book 1), Ansel Adams, Tenth Edition, 1995

Hyperfocal Distance Definition

Hyperfocal distance

... the hyperfocal distance setting ... is simply a fancy term that means the distance setting at any aperture that produces the greatest depth of field.

How to Use Your Camera, New York Institute of Photography, 2000.

If you set the camera's focus to the hyperfocal distance, your depth of field will extend from half of the hyperfocal distance to infinity—a much deeper depth of field.

Complete Digital Photography, Ben Long, 2012.

Another important control for landscape photography is depth of field, the amount of sharpness in a scene, from close to the camera into the distance away from the camera. It's sharpness in depth.

Landscape Photography: From Snapshots to Great Shots, Rob Sheppard, 2012.

© 2005 Don Fleming. All rights reserved.

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