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Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… … Wikipedia
Binoculars — Binocular telescopes, or binoculars (also known as field glasses), are two identical or mirror symmetrical telescopes mounted side by side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular… … Wikipedia
Isaac Newton Telescope — Infobox Telescope bgcolour = name = Isaac Newton Telescope caption = The INT dome by moonlight organization = Isaac Newton Group of Telescopes location = Roque de los Muchachos Observatory, La Palma, Canary Islands coords = altitude = weather =… … Wikipedia
Eye relief — The eye relief of a telescope, a microscope, or binoculars is the distance from the last surface of an eyepiece at which the eye can be placed to match the eyepiece exit pupil to the eye s entrance pupil. Short eye relief requires the observer to … Wikipedia
Cosmic Origins Spectrograph — The Cosmic Origins Spectrograph on its handling cart in the Spacecraft Systems Development Facility cleanroom at the Goddard Space Flight Center The Cosmic Origins Spectrograph (COS) is a science instrument that was installed on the Hubble Space… … Wikipedia

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