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Reflex finder

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How To Use an Orion EZ Finder II Telescope Reflex Sight - Orion Telescopes

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Celestron Binocular Starpointer (Finder) Reflex Sight

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Features of the Orion EZ Finder II Reflex Sight - Orion Telescopes

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EZ Finder Deluxe II reflex - Orion Telescopes

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Features of the Orion EZ Finder Deluxe Reflex Sight - Orion Telescopes

A reflex finder is a viewfinder system with a mirror placed behind a lens. The light passing through the lens is reflected by the mirror to a focusing screen, usually ground glass. The image formed on this ground glass can be observed directly, giving a waist-level reflex finder, or through a redressing optical device for eye-level viewing, giving an eye-level reflex finder.
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