Binoculars

Binoculars are one of the handiest and most widespread of all optical instruments. Virtually anyone who spends much time outdoors owns (or should own) a pair of binoculars. They are almost a necessity for the astronomer, hunter, saltwater fisherman, boater, sports fan, and experienced traveler.

We recommend you to read an article "How to buy Binoculars" in our Expert Advice section. This article is intended to help the person who needs some basic information about binoculars. We hope to explain the specifications and terms commonly associated with binoculars.

Perhaps the first thing to understand is that binoculars are really just two small telescopes mechanically linked together. Each side of a pair of binoculars has a prime focal length, an objective lens, an ocular (eyepiece), an exit pupil, and so forth.

Binoculars are designed to give a correctly oriented, right side up view. This makes them ideal for terrestrial viewing, or for locating astronomical objects in the night sky. A good pair of binoculars is one of the handiest accessories for the astronomer, hunter, sportsman, traveler, birdwatcher, and nature lover. So whether you want to get a better view of the local football game, or find a big buck across a canyon, a good pair of binoculars is often indispensable.