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Discover LudwigThe phrase "focal depth" is correct and usable in written English.
It can be used in contexts related to photography, optics, or geology, referring to the distance from the lens to the subject in focus or the depth at which a particular focus occurs.
Example: "In macro photography, achieving the right focal depth is crucial for capturing sharp details of the subject."
Alternatives: "focus depth" or "depth of field".
Dictionary
focal depth
noun
The depth below the Earth's surface of the hypocentre of an earthquake.
Exact(60)
The problem had been that it was difficult to adjust the focal depth between the two cameras while filming.
And Mr. Cameron's lightweight, dual-camera system allows an operator, looking at that real-time image, to adjust the focal depth simply by twisting a knob.
focal depth.
Color corresponds to focal depth.
The focal depth is about 15 km.
This criterion kept earthquakes whose focal depth was well constrained.
The focal depth is measured at r = 0.35 λ.
Let the uncertainty in focal depth be denoted by dZ.
The gray scale represents the focal depth of earthquakes.
Fig. 7. Focal depth distribution of relocated earthquakes using HypoDD.
So a feature of this display is that it reproduces focal depth.
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