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Examples of focal length in a Sentence
Recent Examples on the Web
The compact model gave him the right match of focal length and sensor size for concert pics.
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Kevin Purdy, Ars Technica, 17 Jan. 2025
On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters.
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Jamie Carter, Space.com, 15 Jan. 2025
Sharp shooters with relatively fast aperture, producing clean shots at the wide (main and selfie camera), or 85mm telephoto (3X zoom) focal length.
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Ben Sin, Forbes, 3 Jan. 2025
The 28-300mm's OIS is effective enough to support crisp handheld exposures at 1/8-second exposure time at the 300mm focal length.
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PCMAG, 11 Dec. 2024
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Word History
First Known Use
1682, in the meaning defined above
Dictionary Entries Near focal length
Cite this Entry
“Focal length.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/focal%20length. Accessed 5 Feb. 2025.
Kids Definition
focal length
noun
: the distance of a focus from the surface of a lens or inwardly-curved mirror
Medical Definition
focal length
noun
: the distance of a focus from the surface of a lens or concave mirror
—symbol f
More from Merriam-Webster on focal length
Britannica.com: Encyclopedia article about focal length
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