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What (who) is field glasses - definition

PAIR OF TELESCOPES MOUNTED SIDE-BY-SIDE

Field glass; Binocular instrument; Field Glasses; Field glasses; Binocular Instrument; Binocs; Binocular telescope; Prism binoculars; Phase correction coating; Binoc; Periscope binoculars

$Porro type, external eyepiece bridge central-focusing binoculars with a rotating diopter on the right eyepiece allowing to adjust refractive differences between the viewer's left and right eyes$

field glasses

¦ plural noun binoculars for outdoor use.

field glasses

n. to focus, train field glasses on

field glasses

see field-glasses

Wikipedia

Binoculars

Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military models.

Unlike a (monocular) telescope, binoculars give users a three-dimensional image: each eyepiece presents a slightly different image to each of the viewer's eyes and the parallax allows the visual cortex to generate an impression of depth.

https://en.wikipedia.org/wiki/Binoculars

Examples of use of field glasses

1. The rest of us sit about as far above the action as if we were in a NASA shuttle, peering down through our field glasses.