For bird watching and all-around purposes, 7× or 8× prism binoculars are preferable.

For fast-action spectator sports where a wide field of view is needed, a 5× or 6× binocular is preferred. At powers above 10 a tripod mounting is recommended. Most people can hold binoculars with 6× or 8× magnification steady enough for clear viewing. Thus it is more difficult to locate a bird or other objects with a high-power instrument. Coil 2x Binocular Spectacles (Far View) These lightweight binoculars are perfect for sporting events, TV, and movies. The field of view, or the area that can be viewed through field glasses or binoculars, decreases as the magnification power increases. Most prism binoculars have a central focusing ring that moves both eyepieces in and out and a separate adjustment for the right eye to correct for vision differences between the eyes. To reduce the loss of light as it passes through the various lenses and prisms, all quality modern binoculars have these coated with special materials. Thus a 6×30 binocular has the same brightness as an 8×40 binocular, while an 8×50 binocular has greater light-gathering ability and is therefore better for nighttime use. As the magnification increases, the lens size must increase proportionally to retain the same light-gathering power, or brightness. Here the first number refers to the magnification, the second to the diameter of the objective lens in millimeters. This allows a shortening of the binoculars and a wider separation of the objective lenses, the large lenses through which the light first enters, increasing the stereoscopic effect.īinoculars are usually rated as 6×30, 8×40, and so on.

Higher magnification is obtained by passing the light beam through internal reflecting prisms within each tube, thereby giving it greater path length. For greater magnification a simple field glass would become too long and heavy, and the prism binocular is used instead. BINOCULARS can put you closer to the action and add to the fun and excitement of many sports and pastimes, provided the glasses you use are good and are.

Binocular glasses