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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.
—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.
—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.
—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.
—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 20 Jan. 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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