Telescopic Sight

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telescopic sight

[¦tel·ə¦skäp·ik ′sīt]
(ordnance)
Gunsight equipped with a telescope.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Telescopic Sight

 

a viewfinder whose optical components form a telescopic (afocal) system.

In the USSR, telescopic systems consisting of a negative, or diverging, objective and a positive, or converging, eyepiece are found in cameras equipped with rangefinders and in some amateur motion-picture cameras. Such viewfinders are of small size and provide a reduced erect image of the object being photographed. They are known as direct-vision optical viewfinders.

Reflex cameras and professional motion-picture cameras employ a telescopic system with a positive objective and eyepiece. Systems of this type produce magnified images of the object being photographed but must be equipped with an inversion system in order to obtain an erect image.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Roy Jinks, Historian of Smith & Wesson, advises me that in the late 1800s long range handgun competition was conducted with S&W revolvers mounted with the rather crude telescope sights then available.
The SAS and Special Boat Squadron have been issued with the rifles, which are equipped with high-powered telescope sights.
Mechanically and optically the Leupold Riflescope is a great advancement in telescope sights. A truly streamlined and novel means of adjusting the reticle for elevation and windage has been incorporated.