Binoculars or 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 vision) when viewing distant objects. Most are sized to be held using both hands, although there are much larger types.

Unlike a monocular telescope, binoculars give users a three-dimensional image: the two views, presented from slightly different viewpoints to each of the viewer's eyes, produce a merged view with depth perception. There is no need to close or obstruct one eye to avoid confusion, as is usual with monocular telescopes.

Real Binoculars are quite expensive, especially those astronomical types and for military usage. It's fun to play around with this gadget.

Anyways, while doing this entry, I remembered the song "Deep" by a band name Binocular. Up to now, a lot of people who know this song still do not know the meaning of the song.hehehe That includes me.