eyepiece

noun
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 An eyepiece changes the focal ratio of your telescope, thus changing the magnification. Cameron Johnson, Popular Mechanics, "How To Get Started in Astronomy," 10 Nov. 2020 With a swing-up eyepiece, this monocular telescope is perfect for anyone who regularly wears glasses or sunglasses. Popular Science, "Get a bigger, clearer view of the world around you with this portable telescope," 6 Oct. 2020 Also, a moderate telescope with a 6″, 8″ diameter or larger aperture is needed to collect enough light to create an image bright enough for the eyepiece to magnify without appearing faint or fuzzy. Curtis Roelle, baltimoresun.com/maryland/carroll, "Star Points: Is the Great Pumpkin rising? No, it’s Mars," 3 Oct. 2020 The Star Trek franchise alone was represented by everything from a Borg eyepiece and a Klingon head to Cardassian panels. Gary Baum, The Hollywood Reporter, "The Memorabilia King vs. the Studio Detective: The Never-Before-Told Account of an Epic Battle Over Stolen Movie Props," 13 Aug. 2020 It's got an adjustable tripod that buyers say is easy to set up, two replaceable eyepieces and a 3x Barlow lens, which is meant to treble the magnifying power of each eyepiece, and is suitable for all ages (little ones included). Nicole Briese, USA TODAY, "The 5 best Amazon deals you can get this Tuesday," 1 July 2020 In their experiments, the researchers placed a series of telescopes around 80 feet away from a target office's light bulb, and put each telescope's eyepiece in front of a Thorlabs PDA100A2 electro-optical sensor. Andy Greenberg, Wired, "Spies Can Eavesdrop by Watching a Light Bulb's Vibrations," 12 June 2020 Simply line up the finder scope with the object in question using the crosshairs, and peer into one of the two included Plossl eyepieces to get up close and personal with your target. Popular Science, "Four stellar telescopes for every stargazer," 9 Apr. 2020 Eye relief refers to the distance between the position your eyes can see the entire field of view while looking through the binoculars and the eyepiece lens surface. The Editors, Field & Stream, "How to Choose the Right Binoculars for You," 8 Apr. 2020

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

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The first known use of eyepiece was in 1729

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Cite this Entry

“Eyepiece.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eyepiece. Accessed 24 Feb. 2021.

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More Definitions for eyepiece

eyepiece

noun

English Language Learners Definition of eyepiece

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

eyepiece

noun
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)

eyepiece

noun
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

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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