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Deep focus is a photographic and cinematographic technique using a large depth of field. Depth of field is the front-to-back range of focus in an image, or how much of it appears sharp and clear. In deep focus, the foreground, middle ground, and background are all in focus. Deep focus is normally achieved by choosing a small aperture.
In shallow focus, one plane of the scene is in focus while the rest is out of focus. Shallow focus is typically used to emphasize one part of the image over another. [1] Photographers sometimes refer to the aesthetic quality of the unfocused area(s) as bokeh. [2] The opposite of shallow focus is deep focus, in which the entire image is in focus.
Depth of field depends on the focus distance, while depth of focus does not. Depth of focus can have two slightly different meanings. The first is the distance over which the image plane can be displaced while a single object plane remains in acceptably sharp focus; [1][2] [clarify] the second is the image-side conjugate of depth of field.
A macro photograph showing the defocused effect of a shallow depth of field on a tilted page of text This photo was taken with an aperture of f /22, creating a mostly in-focus background. The same scene as above with an aperture of f /1.8. Notice how much blurrier the background appears in this photo.
Focus The optical clarity or precision of an image relative to normal human vision. Focus in photographic images is usually expressed in terms of depth. Framing The placement of subjects and other visual content with respect to the boundaries of the image. Hand-held shot A shot where the camera is hand-carried, either with or without a ...
In seismology, the depth of focus or focal depth is the depth at which an earthquake occurs. Earthquakes occurring at a depth of less than 70 km (43 mi) are classified as shallow-focus earthquakes, while those with a focal depth between 70 km (43 mi) and 300 km (190 mi) are commonly termed mid-focus or intermediate-depth earthquakes. [1]
Younger adults, however, say they want to focus on their career or other interests (44%) or don’t want to have kids because they’re concerned about the state of the world other than the ...
The path of deep-focus earthquake seismic waves from focus to recording station goes through the heterogeneous upper mantle and highly variable crust only once. [3] Therefore, the body waves undergo less attenuation and reverberation than seismic waves from shallow earthquakes, resulting in sharp body wave peaks.