Examples of focal length in a Sentence
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That effect can bring a sense of depth to images, but seeing a full picture clearly typically requires you to combine multiple photographs that were shot at different focal lengths.
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Jess Weatherbed, The Verge, 29 Dec. 2025
For example, a telescope with 660mm focal length and a 10mm eyepiece will have a magnification of 66x.
—Jamie Carter, Space.com, 30 Nov. 2025
Consider Zone focusing: A favorite of street photographers, Zone focusing means using the aperture in conjunction with the lens's focal length to control the depth of field and create a zone that will be in focus.
—Scott Gilbertson, Wired News, 15 Nov. 2025
In their experiments, the researchers showed that the plasma lens could focus light across a wide range of XUV wavelengths, with its focal length adjustable by tuning the plasma density.
—Neetika Walter, Interesting Engineering, 5 Nov. 2025
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Jess Weatherbed, The Verge, 29 Dec. 2025
For example, a telescope with 660mm focal length and a 10mm eyepiece will have a magnification of 66x.
—Jamie Carter, Space.com, 30 Nov. 2025
Consider Zone focusing: A favorite of street photographers, Zone focusing means using the aperture in conjunction with the lens's focal length to control the depth of field and create a zone that will be in focus.
—Scott Gilbertson, Wired News, 15 Nov. 2025
In their experiments, the researchers showed that the plasma lens could focus light across a wide range of XUV wavelengths, with its focal length adjustable by tuning the plasma density.
—Neetika Walter, Interesting Engineering, 5 Nov. 2025
See All Example Sentences for focal length
Cite this Entry
“Focal length.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/focal%20length. Accessed 7 Jan. 2026.
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focal length
noun
: the distance of a focus from the surface of a lens or concave mirror
—symbol f
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