Binoculars are two identical telescopes placed side-by-side that are designed to point accurately in the same direction. Once you've looked through them, you want to see everything through your binoculars, they make everything closer and clearer.
There are certain binoculars which are equipped with night-vision technology. For most uses, 8x is a good magnification to choose. Any larger than about 9 or 10, and the natural shake of the human hand will be magnified to such an extent that the image becomes difficult to see, and a tripod will be required.
Lens caps very often get misplaced, so binocular companies attach lens caps to the binocular. As with the aperture of a camera lens, the size of objective lens determines the amount of light that can enter your binoculars.
Some binoculars are designed with a roof prism to make the best use of natural lighting. If you want to buy a telescope which truly brings the universe to life, go to a specialist place that sells telescopes, and who know and love astronomy. The larger the second number after the "x", the more light that enters the binocular and the image will become brighter.
Waterproof binoculars are preferred for all marine, hunting, birding and other nature related activities. Also be aware, that night binoculars cost much more than ordinary binoculars.
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