Depth of Field

In optics, particularly as it relates to film and photography, the depth of field (DOF) is the portion of a scene that appears acceptably sharp in the image. Although a lens can precisely focus at only one distance, the decrease in sharpness is gradual on each side of the focused distance, so that within the DOF, the unsharpness is imperceptible under normal viewing conditions.

In some cases, it may be desirable to have the entire image sharp, and a large DOF is appropriate. In other cases, a small DOF may be more effective, emphasizing the subject while de-emphasizing the foreground and background. In cinematography, a large DOF is often called deep focus, and a small DOF is often called shallow focus.

The DOF is determined by the camera-to-subject distance, the lens focal length, the lens f-number, and the format size or circle of confusion criterion.

For a given format size, at moderate subject distances, DOF is approximately determined by the subject magnification and the lens f-number. For a given f-number, increasing the magnification, either by moving closer to the subject or using a lens of greater focal length, decreases the DOF; decreasing magnification increases DOF. For a given subject magnification, increasing the f-number (decreasing the aperture diameter) increases the DOF; decreasing f-number decreases DOF.

When the “same picture” is taken in two different format sizes from the same distance at the same f-number with lenses that give the same angle of view, and the final images (e.g., in prints, or on a projection screen or electronic display) are the same size, the smaller format has greater DOF.

Many small-format digital SLR camera systems allow using many of the same lenses on both full-frame and “cropped format” cameras. If the subject distance is adjusted to provide the same field of view at the subject, at the same f-number and final-image size, the smaller format has greater DOF, as with the “same picture” comparison above. If pictures are taken from the same distance using the same f-number, and the final images are the same size, the smaller format has less DOF. If pictures taken from the same subject distance are given the same enlargement, both final images will have the same DOF. The final images will, of course, have different sizes.

Cropping an image and enlarging to the same size final image as an uncropped image taken under the same conditions is equivalent to using a smaller format under the same conditions, so the cropped image has less DOF.

When focus is set to the hyperfocal distance, the DOF extends from half the hyperfocal distance to infinity, and the DOF is the largest possible for a given f-number.

The advent of digital technology in photography has provided additional means of controlling the extent of image sharpness; some methods allow extended DOF that would be impossible with traditional techniques, and some allow the DOF to be determined after the image is made.

(From Wikipedia. Gender: Company)


  • Grandma
    2015, United States, UK release: 11 December 2015
  • Admission
    2013, United States, UK release: 14 June 2013
  • A Single Man
    2009, United States, UK release: 12 February 2010

Colleagues of shooting:

Matthew Goode Colin Firth Julianne Moore Ginnifer Goodwin Nicholas Hoult Tom Ford Tom Ford Christopher Isherwood Artina Films Fade to Black Productions David Scearce Tribeca Productions Paul Dano Focus Features Julianne Moore Paul Weitz Paul Weitz Robert De Niro Olivia Thirlby Eddie Rouse Nick Flynn Corduroy Films Paul Rudd Paul Weitz Tina Fey Wallace Shawn Lily Tomlin Nat Wolff Gloria Reuben Jean Hanff Korelitz Karen Croner Paul Weitz Paul Weitz Marcia Gay Harden Judy Greer Julia Garner Lily Tomlin Laverne Cox 1821 Pictures

Biography for: Depth of Field Movies on Kiao: 4

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by Sam Raimi, Marc Webb, with Tobey Maguire, Willem Dafoe, Kirsten Dunst, James Franco, Cliff Robertson, published by Sony Pictures.
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The Salt of the Earth DVD The Salt of the Earth DVD
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Depth of Field's most consulted movies
A Single Man
A SINGLE MAN is based on the novel of the same name by Christopher Isherwood. Set in Los Angeles in 1962, at the height of the Cuban missile crisis, it is the story of a British college professor (Colin Firth) who is struggling to find meaning to his life after the death of his long time partner. The...
Genre: Drama Actors: Matthew Goode, Colin Firth Release date: 12 February 2010
Genre: Drama Comedy Romance Actors: Paul Rudd, Tina Fey Release date: 14 June 2013
Genre: Drama Comedy Actors: Marcia Gay Harden, Judy Greer Release date: 11 December 2015 All the cinema in video