depth of focus

USAGE SUMMARY

The phrase "depth of focus" is correct and usable in written English.
It is typically used in photography and optics to describe the range within which objects appear acceptably sharp in an image. Example: "The photographer adjusted the aperture to increase the depth of focus, ensuring that both the foreground and background were in sharp detail."

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

50 human-written examples

It has such ridiculous depth of focus.

The Guardian - Film

Extended depth of focus for coherence-based cellular imaging.

Harvard University

The process window was sufficient: 0.3 μm depth of focus.

Microelectronic Engineering

The higher numerical aperture ensures the smaller depth of focus.

Handbook of Thin Film Deposition Processes and Techniques Principles, Methods, Equipment and Applicatios

Exposure time was 2 µs and depth of focus was 5.43 µm.

Nature

A method to increase the depth of focus by two step image processing.

Columbia University

Human-verified similar examples from authoritative sources

Similar Expressions

10 human-written examples

Figure 6: Depth-of-Focus two-photon TRPL of the untreated CdTe crystal.

Nature

Figure 7: Depth-of-Focus two-photon TRPL of the treated CdTe crystal.

Nature

Our work also lays the foundation for determining the resolution limit for depth-of-focus 2P-TRPL experiments.

Nature

The depth-of-focus resolution of the 2P excitation is important in determining the spatial limitations of the technique.

Nature

Current UBM systems use fixed-focus transducers, which are limited in depth-of-focus.

Ultrasound in Medicine & Biology

Expert writing Tips

Best practice

When discussing photographic techniques, clarify whether you are referring to "depth of focus" (related to the lens) or "depth of field" (related to the image). While often used interchangeably, they have distinct meanings in technical contexts.

Common error

Avoid using "depth of focus" and "depth of field" as exact synonyms without understanding their specific technical differences. "Depth of focus" refers to the lens's tolerance for image plane displacement, while "depth of field" describes the range of acceptable sharpness in the final image.

Linguistic Context

The phrase "depth of focus" functions primarily as a noun phrase that identifies a specific optical characteristic. Ludwig AI's analysis suggests its use is common in describing imaging properties, as evidenced by the numerous examples related to microscopy and photography.

Expression frequency: Common

Frequent in

Science

45%

News & Media

30%

Academia

25%

Less common in

Encyclopedias

0%

Wiki

0%

Formal & Business

0%

Ludwig's WRAP-UP

The phrase "depth of focus" is a grammatically correct and commonly used term, particularly in scientific, academic, and news contexts. Ludwig AI confirms its primary function as a noun phrase to describe the range of acceptable sharpness in an image, often related to optics and photography. While sometimes used interchangeably with the term "depth of field", "depth of focus" technically refers to the lens's tolerance for image plane displacement. To ensure clarity, technical writing should use these terms precisely. The sources suggest "depth of focus" is most frequently discussed in scientific publications and news articles about technology, microscopy, and image quality.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

depth of field

Refers to the range of distance in an image that appears acceptably sharp, often used interchangeably but can have subtle differences in technical contexts.

focus range

Indicates the extent within which objects are in acceptable focus.

focal depth

Denotes the depth of the area that is in focus, emphasizing the focal point.

range of sharpness

Describes the distance over which objects appear sharp and clear.

zone of focus

Identifies the specific area where objects are sharply defined.

in-focus distance

Highlights the distance at which objects are optimally focused.

image clarity range

Refers to the extent to which the image is clear and well-defined.

sharpness range

Indicates the interval within which objects exhibit high definition.

field of sharpness

Defines the area in an image that maintains a high degree of sharpness.

optical depth

Describes the effective distance light travels through a medium, slightly different application but conceptually related to depth.

FAQs

How does aperture affect "depth of focus"?

Generally, a smaller aperture (higher f-number) increases the "depth of focus", allowing more of the scene to appear sharp. A larger aperture (lower f-number) decreases the "depth of focus", resulting in a shallow area of sharpness and a blurred background.

Is "depth of focus" the same as "depth of field"?

While often used interchangeably, "depth of focus" refers to the lens's tolerance for image plane displacement, while "depth of field" is the range of acceptable sharpness in the final image. In many non-technical contexts, the distinction is minor, but understanding the difference is crucial in technical fields like optics and photography.

What factors influence "depth of focus" in microscopy?

In microscopy, factors such as the numerical aperture of the objective lens, the wavelength of light, and the refractive index of the medium influence the "depth of focus". Higher numerical apertures and shorter wavelengths generally result in a shallower "depth of focus".

How can I increase the "depth of focus" in my photos?

To increase the "depth of focus", you can use a smaller aperture (higher f-number), increase the distance to your subject, or use a lens with a shorter focal length. Techniques like focus stacking can also be used to combine multiple images with different focal points to create an image with an extended "depth of focus".