focal depth
The term "focal depth" has distinct meanings in geology and optics, indicating depth in earthquakes and focus range in imaging, respectively.
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Definition
C1Geology
(technical, academic)The depth below the Earth's surface where an earthquake originates.
Example
- Scientists measured the focal depth of the earthquake to determine its impact.
- Shallow-focus earthquakes, with a focal depth of less than 70 km, often cause more damage.
C1Optics
(technical, photography)The range of distances from a camera lens within which objects appear in sharp focus.
Example
- Adjusting the aperture can increase the focal depth, making more of the scene in focus.
- Photographers often manipulate focal depth to emphasize the subject and blur the background.
Similar
Terms that have similar or relatively close meanings to "focal depth":