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  2. Televue - Wikipedia

    en.wikipedia.org/wiki/Televue

    At the North East Astronomy Forum 2010, they revealed the Ethos SX, a 3.7mm focal length eyepiece with an even greater 110° apparent field-of-view. [3] In 2011, a new line of eyepieces was introduced called the Delos. These eyepieces are based on the Ethos but have a smaller field of view of 72°. Instead, they boast a comfortable 20mm eye relief.

  3. Eyepiece - Wikipedia

    en.wikipedia.org/wiki/Eyepiece

    (The eyepiece and the eye together make an image of the image created by the objective, on the retina of the eye.) The amount of magnification depends on the focal length of the eyepiece. An eyepiece consists of several "lens elements" in a housing, with a "barrel" on one end. The barrel is shaped to fit in a special opening of the instrument ...

  4. Meade Instruments - Wikipedia

    en.wikipedia.org/wiki/Meade_Instruments

    The Meade Instruments (also shortened to Meade) was an American multinational company headquartered in Watsonville, California, that manufactures, imports, and distributes telescopes, binoculars, spotting scopes, microscopes, CCD cameras, and telescope accessories for the consumer market. [2]

  5. History of optics - Wikipedia

    en.wikipedia.org/wiki/History_of_optics

    The word optics is derived from the Greek term τα ὀπτικά meaning 'appearance, look'. [1] Optics was significantly reformed by the developments in the medieval Islamic world, such as the beginnings of physical and physiological optics, and then significantly advanced in early modern Europe, where diffractive optics began. These earlier ...

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  7. Simon Plössl - Wikipedia

    en.wikipedia.org/wiki/Simon_Plössl

    Simon Plössl. Simon Plössl (September 19, 1794, Vienna – January 29, 1868, Vienna) was an Austrian optical instrument maker. Initially trained at the Voigtländer company, he set up his own workshop in 1823.

  8. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Man with glasses. A woman with glasses. Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears.

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