Web App for iPhone / iPod Touch



Format
Lens
f/stop
Focus
Depth of Field
Focus
distance
Near
limit
Far
limit
Total
DOF
10 ft 7.33 ft 15.7 ft 8.41 ft
Hyperfocal distance: 27.1 ft
Instructions:
  1. Select the actual focal length of the lens. For instance, if the focal length of your lens is 50 mm, select 50 mm in the calculator. The calculator will adjust for any focal length multiplier or field of view crop when the appropriate camera or film format is selected.
  2. Select your camera or film format. For digital "point and shoot" cameras, select "Compact digital".
  3. Select an f/stop. The list includes full, half, and one-third f/stops.
  4. The depth of field and hyperfocal distance are calculated each time one of the inputs changes.
  5. Click the "HD" button to set the focus distance at the hyperfocal distance for the selected lens and f/stop.
  6. See Circles of Confusion for Digital Cameras for a list of the circles of confusion (CoC) used in this calculator. The circle of confusion for the "Compact digital" selection is 0.006 mm.
  7. Circles of confusion (CoC) for cinematography are:
    • 16mm : 0.015mm
    • Super 16 : 0.015mm
    • 35mm : 0.025mm
    Because of the wide variation of circles of confusion used in cinematography, other options (1/1000 inch, 1/500 inch, etc.) can be selected also. For more information about circles of confusion as applied in cinematography, see Peter Gray's website.
  8. See the articles at the DOFMaster website for more information about depth of field and hyperfocal distance.






Depth of Field Definition

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

Circles of confusion for digital cameras are listed here.






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.



Image clarity or sharpness is not just a matter of focusing a lens on the subject. There is an area in front of and behind the sharp focus plane that is also sharp or clear, and the extent of this area changes, depending on the focal length of the lens, the focusing distance, and the aperture used. This three-dimensional area of sharp focus is called depth of field.

Lonely Planet Landscape Photography: A Guide to Taking Better Pictures, Peter Eastway, 2005.



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.


When the lens is focused on the hyperfocal distance, the depth of field extends from half the hyperfocal distance to infinity.

Photography, Phil Davis, 1972.




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