eye·​piece | \ ˈī-ˌpēs How to pronounce eyepiece (audio) \

Definition of eyepiece

: the lens or combination of lenses at the eye end of an optical instrument

Examples of eyepiece in a Sentence

Recent Examples on the Web Attach a Camera Vandebergh uses a dedicated astronomical CCD camera, but simple webcams mounted above telescope eyepieces just as well. Eric Adams, Popular Mechanics, "How to Track and Photograph Secret Spacecraft," 10 Nov. 2019 Weirdly, having a camera on your shoulder and looking through an eyepiece focuses the mind. Joey Nolfi, EW.com, "The Aeronauts cinematographer deserves Oscars for shooting an entire movie in fear," 6 Dec. 2019 Porro prisms are inexpensive to make, but often result in larger binoculars as the eyepiece is offset from the binocular tube to allow room for prisms to flip the image on the way to your eye. James Lynch, Popular Mechanics, "8 Great Binoculars for Getting a Closer Look," 18 Oct. 2019 Try using medium- and high-powered eyepieces for additional details. Arnold Pearlstein, sun-sentinel.com, "The Stars This Week: Nov. 3 - 9," 3 Nov. 2019 Although the eyepieces were worn by soldiers on both sides, the German High Command played the biggest part in reviving them. Austin Grossman, The Atlantic, "Monocles Were Never Cool," 13 Oct. 2019 Using low powers to sweep them up is a good idea because your eyepiece will cover more sky ground. Curtis Roelle, baltimoresun.com/maryland/carroll, "Star Points: Fall a great time to view gas giants Uranus and Neptune," 4 Oct. 2019 First, make sure your telescope and all of the eyepieces sit outside for at least a half-hour so the optics can acclimate to the outside temperature. Mike Lynch, Twin Cities, "Sky Watch: The second-prettiest planet — next to Earth, of course — is on the rise," 28 July 2019 Here are a few things to know about Tuesday night’s big show: Saturn is usually best viewed through the eyepiece of a telescope, but those of us who are merely equipped with a pair of naked eyes will have a great view of the planet Tuesday evening. Patrick May, The Mercury News, "Saturn and its rings will be visible tonight; here’s when and where to watch," 9 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eyepiece.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of eyepiece

1729, in the meaning defined above

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Time Traveler for eyepiece

Time Traveler

The first known use of eyepiece was in 1729

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Statistics for eyepiece

Last Updated

11 Jan 2020

Cite this Entry

“Eyepiece.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/eyepiece. Accessed 21 January 2020.

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More Definitions for eyepiece


How to pronounce eyepiece (audio)

English Language Learners Definition of eyepiece

: the part of a telescope or microscope that you look through


eye·​piece | \ ˈī-ˌpēs How to pronounce eyepiece (audio) \

Kids Definition of eyepiece

: the lens or combination of lenses at the eye end of an optical instrument (as a microscope or telescope)


eye·​piece | \ ˈī-ˌpēs How to pronounce eyepiece (audio) \

Medical Definition of eyepiece

: the lens or combination of lenses at the eye end of an optical instrument

called also ocular

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More from Merriam-Webster on eyepiece

Rhyming Dictionary: Words that rhyme with eyepiece

Spanish Central: Translation of eyepiece

Nglish: Translation of eyepiece for Spanish Speakers

Britannica English: Translation of eyepiece for Arabic Speakers

Britannica.com: Encyclopedia article about eyepiece

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