The binocular is an optical instrument that makes it possible to see objects at long distances as if they were nearby. Designed with a cylindrical tube and eyepiece placed on both sides, the binoculars have ample space for use. There are various kinds of night vision, sight and ground sight. Binoculars with waterproof and compass features are used for marine use. Binoculars that look like a small telescope can be viewed at very wide angles. Binocular dimensions are shown as magnification x aperture. The aperture is expressed in mm. High clearance is good. Both eyes are used in good binoculars. This makes the place to be looked at harmonious. Binoculars are light and portable tools.