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  2. See the World in Greater Detail with the Best Binoculars - AOL

    www.aol.com/best-binoculars-seeing-world-close...

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  3. AN/PVS-4 - Wikipedia

    en.wikipedia.org/wiki/AN/PVS-4

    The AN/TVS-5 is an observation scope, although it does come with reticles and can be used as a weapon sight as well. With a larger catadioptric lens and higher zoom level, it is rated with a detection range of over 1 Kilometer with a third-generation image intensifier tube.

  4. Spotting scope - Wikipedia

    en.wikipedia.org/wiki/Spotting_scope

    Magnifications less than 20× are unusual, as are magnifications more than 60× since the latter can lead to poorer image brightness, a narrow field of view and too much image shaking, even on a tripod. The eyepiece mount layout can be "straight-through" (the eyepiece is on the same axis as the scope body), or "angled" (the eyepiece is at an ...

  5. Tower Optical - Wikipedia

    en.wikipedia.org/wiki/Tower_Optical

    Tower Optical Company, Inc. is a small, Norwalk, Connecticut-based company which has manufactured a binocular tower viewer used at major tourist sites in the United States and Canada since 1932. [1] The company's large, silver-colored devices are used at Niagara Falls, the Empire State Building and other locations. [2]

  6. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    Binoculars with high magnification and heavy weight usually require some sort of mount to stabilize the image. A magnification of 10x is generally considered the practical limit for observation with handheld binoculars. Binoculars more powerful than 15×70 require support of some type.

  7. Night-vision device - Wikipedia

    en.wikipedia.org/wiki/Night-vision_device

    1PN50 refractor-based night observation binoculars. [85] 1PN51 reflector-based night sight for a range of small arms and grenade launchers. [86] 1PN51-2 reflector-based night sight for the RPG-29. [87] 1PN58 refractor-based night sight for a range of small arms and grenade launchers. [88] 1PN93-2 reflector-based night sight for the RPG-7D3, see ...